refactor

pom.xml

@@ -43,6 +43,13 @@
             <version>2.0.7</version>
         </dependency>
 
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <version>1.18.26</version>
+            <scope>provided</scope>
+        </dependency>
+
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
@@ -68,7 +75,7 @@
                         <configuration>
                             <transformers>
                                 <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
-                                    <mainClass>haidnor.jvm.Main</mainClass>
+                                    <mainClass>haidnor.jvm.HaidnorJVM</mainClass>
                                 </transformer>
                             </transformers>
                         </configuration>

src/main/java/haidnor/jvm/HaidnorJVM.java

@@ -0,0 +1,83 @@
+package haidnor.jvm;
+
+import haidnor.jvm.bcel.classfile.JavaClass;
+import haidnor.jvm.classloader.JVMClassLoader;
+import haidnor.jvm.core.JavaExecutionEngine;
+import haidnor.jvm.rtda.Metaspace;
+import haidnor.jvm.runtime.JVMThread;
+import haidnor.jvm.util.JVMThreadHolder;
+import lombok.SneakyThrows;
+import org.apache.commons.cli.*;
+
+import java.util.Enumeration;
+import java.util.jar.JarEntry;
+import java.util.jar.JarFile;
+
+/**
+ * <a href="https://github.com/FranzHaidnor">GitHub FranzHaidnor</a>
+ */
+public class HaidnorJVM {
+
+    @SneakyThrows
+    public static void main(String[] args) {
+        String banner = """
+                    ██╗  ██╗ █████╗ ██╗██████╗ ███╗   ██╗ ██████╗ ██████╗          ██╗██╗   ██╗███╗   ███╗
+                    ██║  ██║██╔══██╗██║██╔══██╗████╗  ██║██╔═══██╗██╔══██╗         ██║██║   ██║████╗ ████║
+                    ███████║███████║██║██║  ██║██╔██╗ ██║██║   ██║██████╔╝         ██║██║   ██║██╔████╔██║
+                    ██╔══██║██╔══██║██║██║  ██║██║╚██╗██║██║   ██║██╔══██╗    ██   ██║╚██╗ ██╔╝██║╚██╔╝██║
+                    ██║  ██║██║  ██║██║██████╔╝██║ ╚████║╚██████╔╝██║  ██║    ╚█████╔╝ ╚████╔╝ ██║ ╚═╝ ██║
+                    ╚═╝  ╚═╝╚═╝  ╚═╝╚═╝╚═════╝ ╚═╝  ╚═══╝ ╚═════╝ ╚═╝  ╚═╝     ╚════╝   ╚═══╝  ╚═╝     ╚═╝
+                """;
+        System.out.println(banner);
+
+        CommandLine cmd = initCommandLine(args);
+
+        // 指定从 .jar 文件运行
+        if (cmd.hasOption("jar")) {
+            String jarFilePath = cmd.getOptionValue("jar");
+            try (JarFile jarFile = new JarFile(jarFilePath)) {
+                JVMClassLoader classLoader = new JVMClassLoader(jarFile, "ApplicationClassLoader");
+                String mainClass = jarFile.getManifest().getMainAttributes().getValue("Main-Class");
+
+                Enumeration<JarEntry> entries = jarFile.entries();
+                while (entries.hasMoreElements()) {
+                    JarEntry entry = entries.nextElement();
+                    if (!entry.isDirectory() && entry.getName().endsWith(".class")) {
+                        String className = entry.getName().replace('/', '.').substring(0, entry.getName().length() - 6);
+                        if (className.equals(mainClass)) {
+                            JVMThreadHolder.set(new JVMThread());
+                            JavaClass javaClass = classLoader.loadWithJar(jarFile, entry);
+                            Metaspace.registerJavaClass(javaClass);
+                            JavaExecutionEngine.callMainMethod(javaClass);
+                            return;
+                        }
+                    }
+                }
+            }
+        }
+
+        // 指定从 .class 文件运行
+        if (cmd.hasOption("class")) {
+            JVMThreadHolder.set(new JVMThread());
+            String path = cmd.getOptionValue("class");
+            JVMClassLoader bootClassLoader = new JVMClassLoader("ApplicationClassLoader");
+            JavaClass javaClass = bootClassLoader.loadWithAbsolutePath(path);
+            JavaExecutionEngine.callMainMethod(javaClass);
+        }
+    }
+
+    private static CommandLine initCommandLine(String[] args) throws ParseException {
+        Option jarOption = new Option("jar", true, "运行 jar 程序");
+        Option classOption = new Option("class", true, "运行 .class 字节码文件");
+
+        OptionGroup optionGroup = new OptionGroup();
+        optionGroup.addOption(jarOption).addOption(classOption);
+
+        Options options = new Options();
+        options.addOptionGroup(optionGroup);
+
+        CommandLineParser parser = new DefaultParser();
+        return parser.parse(options, args);
+    }
+
+}

src/main/java/haidnor/jvm/bcel/ExceptionConst.java

@@ -25,24 +25,14 @@ import org.apache.commons.lang3.ArrayUtils;
  */
 public final class ExceptionConst {
 
-    /**
-     * Enum corresponding to the various Exception Class arrays, used by
-     * {@link ExceptionConst#createExceptions(EXCS, Class...)}
-     */
-    public enum EXCS {
-        EXCS_CLASS_AND_INTERFACE_RESOLUTION, EXCS_FIELD_AND_METHOD_RESOLUTION, EXCS_INTERFACE_METHOD_RESOLUTION, EXCS_STRING_RESOLUTION, EXCS_ARRAY_EXCEPTION,
-    }
-
     /**
      * The mother of all exceptions
      */
     public static final Class<Throwable> THROWABLE = Throwable.class;
-
     /**
      * Super class of any run-time exception
      */
     public static final Class<RuntimeException> RUNTIME_EXCEPTION = RuntimeException.class;
-
     /**
      * Super class of any linking exception (aka Linkage Error)
      */
@@ -61,38 +51,32 @@ public final class ExceptionConst {
     public static final Class<NoSuchMethodError> NO_SUCH_METHOD_ERROR = NoSuchMethodError.class;
     public static final Class<NoClassDefFoundError> NO_CLASS_DEF_FOUND_ERROR = NoClassDefFoundError.class;
     public static final Class<UnsatisfiedLinkError> UNSATISFIED_LINK_ERROR = UnsatisfiedLinkError.class;
-
     public static final Class<VerifyError> VERIFY_ERROR = VerifyError.class;
-    /* UnsupportedClassVersionError is new in JDK 1.2 */
-//    public static final Class UnsupportedClassVersionError = UnsupportedClassVersionError.class;
     /**
      * Run-Time Exceptions
      */
     public static final Class<NullPointerException> NULL_POINTER_EXCEPTION = NullPointerException.class;
+    /* UnsupportedClassVersionError is new in JDK 1.2 */
+//    public static final Class UnsupportedClassVersionError = UnsupportedClassVersionError.class;
     public static final Class<ArrayIndexOutOfBoundsException> ARRAY_INDEX_OUT_OF_BOUNDS_EXCEPTION = ArrayIndexOutOfBoundsException.class;
     public static final Class<ArithmeticException> ARITHMETIC_EXCEPTION = ArithmeticException.class;
     public static final Class<NegativeArraySizeException> NEGATIVE_ARRAY_SIZE_EXCEPTION = NegativeArraySizeException.class;
     public static final Class<ClassCastException> CLASS_CAST_EXCEPTION = ClassCastException.class;
-
     public static final Class<IllegalMonitorStateException> ILLEGAL_MONITOR_STATE = IllegalMonitorStateException.class;
     /**
      * Pre-defined exception arrays according to chapters 5.1-5.4 of the Java Virtual Machine Specification
      */
     private static final Class<?>[] EXCS_CLASS_AND_INTERFACE_RESOLUTION = {NO_CLASS_DEF_FOUND_ERROR, CLASS_FORMAT_ERROR, VERIFY_ERROR, ABSTRACT_METHOD_ERROR,
             EXCEPTION_IN_INITIALIZER_ERROR, ILLEGAL_ACCESS_ERROR}; // Chapter 5.1
-
     private static final Class<?>[] EXCS_FIELD_AND_METHOD_RESOLUTION = {NO_SUCH_FIELD_ERROR, ILLEGAL_ACCESS_ERROR, NO_SUCH_METHOD_ERROR}; // Chapter 5.2
-
     /**
      * Empty array.
      */
     private static final Class<?>[] EXCS_INTERFACE_METHOD_RESOLUTION = new Class[0]; // Chapter 5.3 (as below)
-
     /**
      * Empty array.
      */
     private static final Class<?>[] EXCS_STRING_RESOLUTION = new Class[0];
-
     // Chapter 5.4 (no errors but the ones that _always_ could happen! How stupid.)
     private static final Class<?>[] EXCS_ARRAY_EXCEPTION = {NULL_POINTER_EXCEPTION, ARRAY_INDEX_OUT_OF_BOUNDS_EXCEPTION};
 
@@ -125,4 +109,12 @@ public final class ExceptionConst {
         return ArrayUtils.addAll(input, extraClasses);
     }
 
+    /**
+     * Enum corresponding to the various Exception Class arrays, used by
+     * {@link ExceptionConst#createExceptions(EXCS, Class...)}
+     */
+    public enum EXCS {
+        EXCS_CLASS_AND_INTERFACE_RESOLUTION, EXCS_FIELD_AND_METHOD_RESOLUTION, EXCS_INTERFACE_METHOD_RESOLUTION, EXCS_STRING_RESOLUTION, EXCS_ARRAY_EXCEPTION,
+    }
+
 }

src/main/java/haidnor/jvm/bcel/Repository.java

@@ -77,6 +77,13 @@ public abstract class Repository {
         return repository;
     }
 
+    /**
+     * Sets repository instance to be used for class loading
+     */
+    public static void setRepository(final haidnor.jvm.bcel.util.Repository rep) {
+        repository = rep;
+    }
+
     /**
      * @return list of super classes of clazz in ascending order, i.e., Object is always the last element
      * @throws ClassNotFoundException if any of the superclasses can't be found
@@ -162,9 +169,9 @@ public abstract class Repository {
     /**
      * Tries to find class source using the internal repository instance.
      *
-     * @see Class
      * @return JavaClass object for given runtime class
      * @throws ClassNotFoundException if the class could not be found or parsed correctly
+     * @see Class
      */
     public static JavaClass lookupClass(final Class<?> clazz) throws ClassNotFoundException {
         return repository.loadClass(clazz);
@@ -205,11 +212,4 @@ public abstract class Repository {
     public static void removeClass(final String clazz) {
         repository.removeClass(repository.findClass(clazz));
     }
-
-    /**
-     * Sets repository instance to be used for class loading
-     */
-    public static void setRepository(final haidnor.jvm.bcel.util.Repository rep) {
-        repository = rep;
-    }
 }

src/main/java/haidnor/jvm/bcel/classfile/AccessFlags.java

@@ -46,6 +46,15 @@ public abstract class AccessFlags {
         return access_flags;
     }
 
+    /**
+     * Set access flags aka "modifiers".
+     *
+     * @param accessFlags Access flags of the object.
+     */
+    public final void setAccessFlags(final int accessFlags) {
+        this.access_flags = accessFlags;
+    }
+
     /**
      * @return Access flags of the object aka. "modifiers".
      */
@@ -53,6 +62,15 @@ public abstract class AccessFlags {
         return access_flags;
     }
 
+    /**
+     * Set access flags aka "modifiers".
+     *
+     * @param accessFlags Access flags of the object.
+     */
+    public final void setModifiers(final int accessFlags) {
+        setAccessFlags(accessFlags);
+    }
+
     public final boolean isAbstract() {
         return (access_flags & Const.ACC_ABSTRACT) != 0;
     }
@@ -181,15 +199,6 @@ public abstract class AccessFlags {
         setFlag(Const.ACC_VOLATILE, flag);
     }
 
-    /**
-     * Set access flags aka "modifiers".
-     *
-     * @param accessFlags Access flags of the object.
-     */
-    public final void setAccessFlags(final int accessFlags) {
-        this.access_flags = accessFlags;
-    }
-
     private void setFlag(final int flag, final boolean set) {
         if ((access_flags & flag) != 0) { // Flag is set already
             if (!set) {
@@ -199,13 +208,4 @@ public abstract class AccessFlags {
             access_flags |= flag;
         }
     }
-
-    /**
-     * Set access flags aka "modifiers".
-     *
-     * @param accessFlags Access flags of the object.
-     */
-    public final void setModifiers(final int accessFlags) {
-        setAccessFlags(accessFlags);
-    }
 }

src/main/java/haidnor/jvm/bcel/classfile/AnnotationEntry.java

@@ -31,6 +31,16 @@ import java.util.stream.Stream;
 public class AnnotationEntry implements Node {
 
     public static final AnnotationEntry[] EMPTY_ARRAY = {};
+    private final int typeIndex;
+    private final ConstantPool constantPool;
+    private final boolean isRuntimeVisible;
+    private List<ElementValuePair> elementValuePairs;
+
+    public AnnotationEntry(final int typeIndex, final ConstantPool constantPool, final boolean isRuntimeVisible) {
+        this.typeIndex = typeIndex;
+        this.constantPool = constantPool;
+        this.isRuntimeVisible = isRuntimeVisible;
+    }
 
     public static AnnotationEntry[] createAnnotationEntries(final Attribute[] attrs) {
         // Find attributes that contain annotation data
@@ -58,20 +68,6 @@ public class AnnotationEntry implements Node {
         return annotationEntry;
     }
 
-    private final int typeIndex;
-
-    private final ConstantPool constantPool;
-
-    private final boolean isRuntimeVisible;
-
-    private List<ElementValuePair> elementValuePairs;
-
-    public AnnotationEntry(final int typeIndex, final ConstantPool constantPool, final boolean isRuntimeVisible) {
-        this.typeIndex = typeIndex;
-        this.constantPool = constantPool;
-        this.isRuntimeVisible = isRuntimeVisible;
-    }
-
     /**
      * Called by objects that are traversing the nodes of the tree implicitly defined by the contents of a Java class.
      * I.e., the hierarchy of methods, fields, attributes, etc. spawns a tree of objects.

src/main/java/haidnor/jvm/bcel/classfile/Annotations.java

@@ -31,8 +31,8 @@ import java.util.stream.Stream;
  */
 public abstract class Annotations extends Attribute implements Iterable<AnnotationEntry> {
 
-    private AnnotationEntry[] annotationTable;
     private final boolean isRuntimeVisible;
+    private AnnotationEntry[] annotationTable;
 
     /**
      * Constructs an instance.

src/main/java/haidnor/jvm/bcel/classfile/Attribute.java

@@ -53,16 +53,57 @@ import java.util.Map;
  */
 public abstract class Attribute implements Cloneable, Node {
 
-    private static final boolean debug = Boolean.getBoolean(Attribute.class.getCanonicalName() + ".debug"); // Debugging on/off
-
-    private static final Map<String, Object> READERS = new HashMap<>();
-
     /**
      * Empty array.
      *
      * @since 6.6.0
      */
     public static final Attribute[] EMPTY_ARRAY = {};
+    private static final boolean debug = Boolean.getBoolean(Attribute.class.getCanonicalName() + ".debug"); // Debugging on/off
+    private static final Map<String, Object> READERS = new HashMap<>();
+    /**
+     * @deprecated (since 6.0) will be made private; do not access directly, use getter/setter
+     */
+    @java.lang.Deprecated
+    protected int name_index; // Points to attribute name in constant pool TODO make private (has getter & setter)
+    /**
+     * @deprecated (since 6.0) (since 6.0) will be made private; do not access directly, use getter/setter
+     */
+    @java.lang.Deprecated
+    protected int length; // Content length of attribute field TODO make private (has getter & setter)
+    /**
+     * @deprecated (since 6.0) will be made private; do not access directly, use getter/setter
+     */
+    @java.lang.Deprecated
+    protected byte tag; // Tag to distinguish subclasses TODO make private & final; supposed to be immutable
+    /**
+     * @deprecated (since 6.0) will be made private; do not access directly, use getter/setter
+     */
+    @java.lang.Deprecated
+    protected ConstantPool constant_pool; // TODO make private (has getter & setter)
+
+    /**
+     * Constructs an instance.
+     *
+     * <pre>
+     * attribute_info {
+     *   u2 attribute_name_index;
+     *   u4 attribute_length;
+     *   u1 info[attribute_length];
+     * }
+     * </pre>
+     *
+     * @param tag          tag.
+     * @param nameIndex    u2 name index.
+     * @param length       u4 length.
+     * @param constantPool constant pool.
+     */
+    protected Attribute(final byte tag, final int nameIndex, final int length, final ConstantPool constantPool) {
+        this.tag = tag;
+        this.name_index = Args.requireU2(nameIndex, 0, constantPool.getLength(), getClass().getSimpleName() + " name index");
+        this.length = Args.requireU4(length, getClass().getSimpleName() + " attribute length");
+        this.constant_pool = constantPool;
+    }
 
     /**
      * Add an Attribute reader capable of parsing (user-defined) attributes named "name". You should not add readers for the
@@ -85,13 +126,12 @@ public abstract class Attribute implements Cloneable, Node {
      * Class method reads one attribute from the input data stream. This method must not be accessible from the outside. It
      * is called by the Field and Method constructor methods.
      *
-     * @see JavaField
-     * @see JavaMethod
-     *
      * @param dataInput    Input stream
      * @param constantPool Array of constants
      * @return Attribute
      * @throws IOException if an I/O error occurs.
+     * @see JavaField
+     * @see JavaMethod
      * @since 6.0
      */
     public static Attribute readAttribute(final DataInput dataInput, final ConstantPool constantPool) throws IOException {
@@ -188,13 +228,12 @@ public abstract class Attribute implements Cloneable, Node {
      * Class method reads one attribute from the input data stream. This method must not be accessible from the outside. It
      * is called by the Field and Method constructor methods.
      *
-     * @see JavaField
-     * @see JavaMethod
-     *
      * @param dataInputStream Input stream
      * @param constantPool    Array of constants
      * @return Attribute
      * @throws IOException if an I/O error occurs.
+     * @see JavaField
+     * @see JavaMethod
      */
     public static Attribute readAttribute(final DataInputStream dataInputStream, final ConstantPool constantPool) throws IOException {
         return readAttribute((DataInput) dataInputStream, constantPool);
@@ -209,53 +248,6 @@ public abstract class Attribute implements Cloneable, Node {
         READERS.remove(name);
     }
 
-    /**
-     * @deprecated (since 6.0) will be made private; do not access directly, use getter/setter
-     */
-    @java.lang.Deprecated
-    protected int name_index; // Points to attribute name in constant pool TODO make private (has getter & setter)
-
-    /**
-     * @deprecated (since 6.0) (since 6.0) will be made private; do not access directly, use getter/setter
-     */
-    @java.lang.Deprecated
-    protected int length; // Content length of attribute field TODO make private (has getter & setter)
-
-    /**
-     * @deprecated (since 6.0) will be made private; do not access directly, use getter/setter
-     */
-    @java.lang.Deprecated
-    protected byte tag; // Tag to distinguish subclasses TODO make private & final; supposed to be immutable
-
-    /**
-     * @deprecated (since 6.0) will be made private; do not access directly, use getter/setter
-     */
-    @java.lang.Deprecated
-    protected ConstantPool constant_pool; // TODO make private (has getter & setter)
-
-    /**
-     * Constructs an instance.
-     *
-     * <pre>
-     * attribute_info {
-     *   u2 attribute_name_index;
-     *   u4 attribute_length;
-     *   u1 info[attribute_length];
-     * }
-     * </pre>
-     *
-     * @param tag tag.
-     * @param nameIndex u2 name index.
-     * @param length u4 length.
-     * @param constantPool constant pool.
-     */
-    protected Attribute(final byte tag, final int nameIndex, final int length, final ConstantPool constantPool) {
-        this.tag = tag;
-        this.name_index = Args.requireU2(nameIndex, 0, constantPool.getLength(), getClass().getSimpleName() + " name index");
-        this.length = Args.requireU4(length, getClass().getSimpleName() + " attribute length");
-        this.constant_pool = constantPool;
-    }
-
     /**
      * Called by objects that are traversing the nodes of the tree implicitly defined by the contents of a Java class.
      * I.e., the hierarchy of methods, fields, attributes, etc. spawns a tree of objects.
@@ -306,6 +298,14 @@ public abstract class Attribute implements Cloneable, Node {
         return constant_pool;
     }
 
+    /**
+     * @param constantPool Constant pool to be used for this object.
+     * @see ConstantPool
+     */
+    public final void setConstantPool(final ConstantPool constantPool) {
+        this.constant_pool = constantPool;
+    }
+
     /**
      * @return Length of attribute field in bytes.
      */
@@ -313,6 +313,13 @@ public abstract class Attribute implements Cloneable, Node {
         return length;
     }
 
+    /**
+     * @param length length in bytes.
+     */
+    public final void setLength(final int length) {
+        this.length = length;
+    }
+
     /**
      * @return Name of attribute
      * @since 6.0
@@ -328,28 +335,6 @@ public abstract class Attribute implements Cloneable, Node {
         return name_index;
     }
 
-    /**
-     * @return Tag of attribute, i.e., its type. Value may not be altered, thus there is no setTag() method.
-     */
-    public final byte getTag() {
-        return tag;
-    }
-
-    /**
-     * @param constantPool Constant pool to be used for this object.
-     * @see ConstantPool
-     */
-    public final void setConstantPool(final ConstantPool constantPool) {
-        this.constant_pool = constantPool;
-    }
-
-    /**
-     * @param length length in bytes.
-     */
-    public final void setLength(final int length) {
-        this.length = length;
-    }
-
     /**
      * @param nameIndex of attribute.
      */
@@ -357,6 +342,13 @@ public abstract class Attribute implements Cloneable, Node {
         this.name_index = nameIndex;
     }
 
+    /**
+     * @return Tag of attribute, i.e., its type. Value may not be altered, thus there is no setTag() method.
+     */
+    public final byte getTag() {
+        return tag;
+    }
+
     /**
      * @return attribute name.
      */

src/main/java/haidnor/jvm/bcel/classfile/BootstrapMethod.java

@@ -34,10 +34,14 @@ import java.util.Arrays;
  */
 public class BootstrapMethod implements Cloneable {
 
-    /** Index of the CONSTANT_MethodHandle_info structure in the constant_pool table */
+    /**
+     * Index of the CONSTANT_MethodHandle_info structure in the constant_pool table
+     */
     private int bootstrapMethodRef;
 
-    /** Array of references to the constant_pool table */
+    /**
+     * Array of references to the constant_pool table
+     */
     private int[] bootstrapArguments;
 
     /**
@@ -110,20 +114,6 @@ public class BootstrapMethod implements Cloneable {
         return bootstrapArguments;
     }
 
-    /**
-     * @return index into constant_pool of bootstrap_method
-     */
-    public int getBootstrapMethodRef() {
-        return bootstrapMethodRef;
-    }
-
-    /**
-     * @return count of number of boostrap arguments
-     */
-    public int getNumBootstrapArguments() {
-        return bootstrapArguments.length;
-    }
-
     /**
      * @param bootstrapArguments int[] indices into constant_pool of CONSTANT_[type]_info
      */
@@ -131,6 +121,13 @@ public class BootstrapMethod implements Cloneable {
         this.bootstrapArguments = bootstrapArguments;
     }
 
+    /**
+     * @return index into constant_pool of bootstrap_method
+     */
+    public int getBootstrapMethodRef() {
+        return bootstrapMethodRef;
+    }
+
     /**
      * @param bootstrapMethodRef int index into constant_pool of CONSTANT_MethodHandle
      */
@@ -138,6 +135,13 @@ public class BootstrapMethod implements Cloneable {
         this.bootstrapMethodRef = bootstrapMethodRef;
     }
 
+    /**
+     * @return count of number of boostrap arguments
+     */
+    public int getNumBootstrapArguments() {
+        return bootstrapArguments.length;
+    }
+
     /**
      * @return String representation.
      */

src/main/java/haidnor/jvm/bcel/classfile/BootstrapMethods.java

@@ -122,11 +122,6 @@ public class BootstrapMethods extends Attribute implements Iterable<BootstrapMet
         return bootstrapMethods;
     }
 
-    @Override
-    public Iterator<BootstrapMethod> iterator() {
-        return Stream.of(bootstrapMethods).iterator();
-    }
-
     /**
      * @param bootstrapMethods the array of bootstrap methods
      */
@@ -134,6 +129,11 @@ public class BootstrapMethods extends Attribute implements Iterable<BootstrapMet
         this.bootstrapMethods = bootstrapMethods;
     }
 
+    @Override
+    public Iterator<BootstrapMethod> iterator() {
+        return Stream.of(bootstrapMethods).iterator();
+    }
+
     /**
      * @return String representation.
      */

src/main/java/haidnor/jvm/bcel/classfile/ClassParser.java

@@ -26,7 +26,7 @@ import java.util.zip.ZipFile;
  * Wrapper class that parses a given Java .class file. The method <a href ="#parse">parse</a> returns a
  * <a href ="JavaClass.html"> JavaClass</a> object on success. When an I/O error or an inconsistency occurs an
  * appropriate exception is propagated back to the caller.
- *
+ * <p>
  * The structure and the names comply, except for a few conveniences, exactly with the
  * <a href="http://docs.oracle.com/javase/specs/"> JVM specification 1.0</a>. See this paper for further details about
  * the structure of a bytecode file.
@@ -34,9 +34,10 @@ import java.util.zip.ZipFile;
 public final class ClassParser {
 
     private static final int BUFSIZE = 8192;
-    private DataInputStream dataInputStream;
     private final boolean fileOwned;
     private final String fileName;
+    private final boolean isZip; // Loaded from zip file
+    private DataInputStream dataInputStream;
     private String zipFile;
     private int classNameIndex;
     private int superclassNameIndex;
@@ -48,7 +49,6 @@ public final class ClassParser {
     private JavaField[] fields; // class fields, i.e., its variables
     private JavaMethod[] methods; // methods defined in the class
     private Attribute[] attributes; // attributes defined in the class
-    private final boolean isZip; // Loaded from zip file
 
     /**
      * Parses class from the given stream.

src/main/java/haidnor/jvm/bcel/classfile/Code.java

@@ -29,7 +29,7 @@ import java.util.Arrays;
  * This class represents a chunk of Java byte code contained in a method. It is instantiated by the
  * <em>Attribute.readAttribute()</em> method. A <em>Code</em> attribute contains informations about operand stack, local
  * variables, byte code and the exceptions handled within this method.
- *
+ * <p>
  * This attribute has attributes itself, namely <em>LineNumberTable</em> which is used for debugging purposes and
  * <em>LocalVariableTable</em> which contains information about the local variables.
  *
@@ -52,6 +52,7 @@ import java.util.Arrays;
  *   attribute_info attributes[attributes_count];
  * }
  * </pre>
+ *
  * @see Attribute
  * @see CodeException
  * @see LineNumberTable
@@ -160,9 +161,8 @@ public final class Code extends Attribute {
     }
 
     /**
-     * @return deep copy of this attribute
-     *
      * @param constantPool the constant pool to duplicate
+     * @return deep copy of this attribute
      */
     @Override
     public Attribute copy(final ConstantPool constantPool) {
@@ -209,6 +209,14 @@ public final class Code extends Attribute {
         return attributes;
     }
 
+    /**
+     * @param attributes the attributes to set for this Code
+     */
+    public void setAttributes(final Attribute[] attributes) {
+        this.attributes = attributes != null ? attributes : EMPTY_ARRAY;
+        super.setLength(calculateLength()); // Adjust length
+    }
+
     /**
      * @return Actual byte code of the method.
      */
@@ -216,6 +224,14 @@ public final class Code extends Attribute {
         return code;
     }
 
+    /**
+     * @param code byte code
+     */
+    public void setCode(final byte[] code) {
+        this.code = code != null ? code : ArrayUtils.EMPTY_BYTE_ARRAY;
+        super.setLength(calculateLength()); // Adjust length
+    }
+
     /**
      * @return Table of handled exceptions.
      * @see CodeException
@@ -224,6 +240,14 @@ public final class Code extends Attribute {
         return exceptionTable;
     }
 
+    /**
+     * @param exceptionTable exception table
+     */
+    public void setExceptionTable(final CodeException[] exceptionTable) {
+        this.exceptionTable = exceptionTable != null ? exceptionTable : CodeException.EMPTY_CODE_EXCEPTION_ARRAY;
+        super.setLength(calculateLength()); // Adjust length
+    }
+
     /**
      * @return the internal length of this code attribute (minus the first 6 bytes) and excluding all its attributes
      */
@@ -266,37 +290,6 @@ public final class Code extends Attribute {
         return maxLocals;
     }
 
-    /**
-     * @return Maximum size of stack used by this method.
-     */
-    public int getMaxStack() {
-        return maxStack;
-    }
-
-    /**
-     * @param attributes the attributes to set for this Code
-     */
-    public void setAttributes(final Attribute[] attributes) {
-        this.attributes = attributes != null ? attributes : EMPTY_ARRAY;
-        super.setLength(calculateLength()); // Adjust length
-    }
-
-    /**
-     * @param code byte code
-     */
-    public void setCode(final byte[] code) {
-        this.code = code != null ? code : ArrayUtils.EMPTY_BYTE_ARRAY;
-        super.setLength(calculateLength()); // Adjust length
-    }
-
-    /**
-     * @param exceptionTable exception table
-     */
-    public void setExceptionTable(final CodeException[] exceptionTable) {
-        this.exceptionTable = exceptionTable != null ? exceptionTable : CodeException.EMPTY_CODE_EXCEPTION_ARRAY;
-        super.setLength(calculateLength()); // Adjust length
-    }
-
     /**
      * @param maxLocals maximum number of local variables
      */
@@ -304,6 +297,13 @@ public final class Code extends Attribute {
         this.maxLocals = maxLocals;
     }
 
+    /**
+     * @return Maximum size of stack used by this method.
+     */
+    public int getMaxStack() {
+        return maxStack;
+    }
+
     /**
      * @param maxStack maximum stack size
      */

src/main/java/haidnor/jvm/bcel/classfile/CodeException.java

@@ -154,27 +154,6 @@ public final class CodeException implements Cloneable, Node {
         return catchType;
     }
 
-    /**
-     * @return Exclusive end index of the region where the handler is active.
-     */
-    public int getEndPC() {
-        return endPc;
-    }
-
-    /**
-     * @return Starting address of exception handler, relative to the code.
-     */
-    public int getHandlerPC() {
-        return handlerPc;
-    }
-
-    /**
-     * @return Inclusive start index of the region where the handler is active.
-     */
-    public int getStartPC() {
-        return startPc;
-    }
-
     /**
      * @param catchType the type of exception that is caught
      */
@@ -182,6 +161,13 @@ public final class CodeException implements Cloneable, Node {
         this.catchType = catchType;
     }
 
+    /**
+     * @return Exclusive end index of the region where the handler is active.
+     */
+    public int getEndPC() {
+        return endPc;
+    }
+
     /**
      * @param endPc end of handled block
      */
@@ -189,6 +175,13 @@ public final class CodeException implements Cloneable, Node {
         this.endPc = endPc;
     }
 
+    /**
+     * @return Starting address of exception handler, relative to the code.
+     */
+    public int getHandlerPC() {
+        return handlerPc;
+    }
+
     /**
      * @param handlerPc where the actual code is
      */
@@ -196,6 +189,13 @@ public final class CodeException implements Cloneable, Node {
         this.handlerPc = handlerPc;
     }
 
+    /**
+     * @return Inclusive start index of the region where the handler is active.
+     */
+    public int getStartPC() {
+        return startPc;
+    }
+
     /**
      * @param startPc start of handled block
      */

src/main/java/haidnor/jvm/bcel/classfile/Constant.java

@@ -45,6 +45,15 @@ public abstract class Constant implements Cloneable, Node {
             return THIS.toString().hashCode();
         }
     };
+    /**
+     * @deprecated (since 6.0) will be made private; do not access directly, use getter/setter
+     */
+    @java.lang.Deprecated
+    protected byte tag; // TODO should be private & final
+
+    Constant(final byte tag) {
+        this.tag = tag;
+    }
 
     /**
      * @return Comparison strategy object
@@ -53,6 +62,21 @@ public abstract class Constant implements Cloneable, Node {
         return bcelComparator;
     }
 
+    /*
+     * In fact this tag is redundant since we can distinguish different 'Constant' objects by their type, i.e., via
+     * 'instanceof'. In some places we will use the tag for switch()es anyway.
+     *
+     * First, we want match the specification as closely as possible. Second we need the tag as an index to select the
+     * corresponding class name from the 'CONSTANT_NAMES' array.
+     */
+
+    /**
+     * @param comparator Comparison strategy object
+     */
+    public static void setComparator(final BCELComparator comparator) {
+        bcelComparator = comparator;
+    }
+
     /**
      * Reads one constant from the given input, the type depends on a tag byte.
      *
@@ -104,30 +128,6 @@ public abstract class Constant implements Cloneable, Node {
         }
     }
 
-    /**
-     * @param comparator Comparison strategy object
-     */
-    public static void setComparator(final BCELComparator comparator) {
-        bcelComparator = comparator;
-    }
-
-    /*
-     * In fact this tag is redundant since we can distinguish different 'Constant' objects by their type, i.e., via
-     * 'instanceof'. In some places we will use the tag for switch()es anyway.
-     *
-     * First, we want match the specification as closely as possible. Second we need the tag as an index to select the
-     * corresponding class name from the 'CONSTANT_NAMES' array.
-     */
-    /**
-     * @deprecated (since 6.0) will be made private; do not access directly, use getter/setter
-     */
-    @java.lang.Deprecated
-    protected byte tag; // TODO should be private & final
-
-    Constant(final byte tag) {
-        this.tag = tag;
-    }
-
     /**
      * Called by objects that are traversing the nodes of the tree implicitly defined by the contents of a Java class.
      * I.e., the hierarchy of methods, fields, attributes, etc. spawns a tree of objects.

src/main/java/haidnor/jvm/bcel/classfile/ConstantCP.java

@@ -107,13 +107,6 @@ public abstract class ConstantCP extends Constant {
         return class_index;
     }
 
-    /**
-     * @return Reference (index) to signature of the field.
-     */
-    public final int getNameAndTypeIndex() {
-        return name_and_type_index;
-    }
-
     /**
      * @param classIndex points to Constant_class
      */
@@ -121,6 +114,13 @@ public abstract class ConstantCP extends Constant {
         this.class_index = classIndex;
     }
 
+    /**
+     * @return Reference (index) to signature of the field.
+     */
+    public final int getNameAndTypeIndex() {
+        return name_and_type_index;
+    }
+
     /**
      * @param nameAndTypeIndex points to Constant_NameAndType
      */
@@ -130,7 +130,7 @@ public abstract class ConstantCP extends Constant {
 
     /**
      * @return String representation.
-     *
+     * <p>
      * not final as ConstantInvokeDynamic needs to modify
      */
     @Override

src/main/java/haidnor/jvm/bcel/classfile/ConstantDouble.java

@@ -88,6 +88,13 @@ public final class ConstantDouble extends Constant implements ConstantObject {
         return bytes;
     }
 
+    /**
+     * @param bytes the raw bytes that represent the double value
+     */
+    public void setBytes(final double bytes) {
+        this.bytes = bytes;
+    }
+
     /**
      * @return Double object
      */
@@ -96,13 +103,6 @@ public final class ConstantDouble extends Constant implements ConstantObject {
         return Double.valueOf(bytes);
     }
 
-    /**
-     * @param bytes the raw bytes that represent the double value
-     */
-    public void setBytes(final double bytes) {
-        this.bytes = bytes;
-    }
-
     /**
      * @return String representation.
      */

src/main/java/haidnor/jvm/bcel/classfile/ConstantDynamic.java

@@ -68,7 +68,7 @@ public final class ConstantDynamic extends ConstantCP {
 
     /**
      * @return Reference (index) to bootstrap method this constant refers to.
-     *
+     * <p>
      * Note that this method is a functional duplicate of getClassIndex for use by ConstantInvokeDynamic.
      * @since 6.0
      */

src/main/java/haidnor/jvm/bcel/classfile/ConstantFloat.java

@@ -89,6 +89,13 @@ public final class ConstantFloat extends Constant implements ConstantObject {
         return bytes;
     }
 
+    /**
+     * @param bytes the raw bytes that represent this float
+     */
+    public void setBytes(final float bytes) {
+        this.bytes = bytes;
+    }
+
     /**
      * @return Float object
      */
@@ -97,13 +104,6 @@ public final class ConstantFloat extends Constant implements ConstantObject {
         return Float.valueOf(bytes);
     }
 
-    /**
-     * @param bytes the raw bytes that represent this float
-     */
-    public void setBytes(final float bytes) {
-        this.bytes = bytes;
-    }
-
     /**
      * @return String representation.
      */

src/main/java/haidnor/jvm/bcel/classfile/ConstantInteger.java

@@ -88,6 +88,13 @@ public final class ConstantInteger extends Constant implements ConstantObject {
         return bytes;
     }
 
+    /**
+     * @param bytes the raw bytes that represent this integer
+     */
+    public void setBytes(final int bytes) {
+        this.bytes = bytes;
+    }
+
     /**
      * @return Integer object
      */
@@ -96,13 +103,6 @@ public final class ConstantInteger extends Constant implements ConstantObject {
         return Integer.valueOf(bytes);
     }
 
-    /**
-     * @param bytes the raw bytes that represent this integer
-     */
-    public void setBytes(final int bytes) {
-        this.bytes = bytes;
-    }
-
     /**
      * @return String representation.
      */

src/main/java/haidnor/jvm/bcel/classfile/ConstantInvokeDynamic.java

@@ -67,7 +67,7 @@ public final class ConstantInvokeDynamic extends ConstantCP {
 
     /**
      * @return Reference (index) to bootstrap method this constant refers to.
-     *
+     * <p>
      * Note that this method is a functional duplicate of getClassIndex for use by ConstantInvokeDynamic.
      * @since 6.0
      */

src/main/java/haidnor/jvm/bcel/classfile/ConstantLong.java

@@ -88,6 +88,13 @@ public final class ConstantLong extends Constant implements ConstantObject {
         return bytes;
     }
 
+    /**
+     * @param bytes the raw bytes that represent this long
+     */
+    public void setBytes(final long bytes) {
+        this.bytes = bytes;
+    }
+
     /**
      * @return Long object
      */
@@ -96,13 +103,6 @@ public final class ConstantLong extends Constant implements ConstantObject {
         return Long.valueOf(bytes);
     }
 
-    /**
-     * @param bytes the raw bytes that represent this long
-     */
-    public void setBytes(final long bytes) {
-        this.bytes = bytes;
-    }
-
     /**
      * @return String representation.
      */

src/main/java/haidnor/jvm/bcel/classfile/ConstantMethodHandle.java

@@ -86,14 +86,14 @@ public final class ConstantMethodHandle extends Constant {
         return referenceIndex;
     }
 
-    public int getReferenceKind() {
-        return referenceKind;
-    }
-
     public void setReferenceIndex(final int referenceIndex) {
         this.referenceIndex = referenceIndex;
     }
 
+    public int getReferenceKind() {
+        return referenceKind;
+    }
+
     public void setReferenceKind(final int referenceKind) {
         this.referenceKind = referenceKind;
     }

src/main/java/haidnor/jvm/bcel/classfile/ConstantNameAndType.java

@@ -100,6 +100,13 @@ public final class ConstantNameAndType extends Constant {
         return nameIndex;
     }
 
+    /**
+     * @param nameIndex the name index of this constant
+     */
+    public void setNameIndex(final int nameIndex) {
+        this.nameIndex = nameIndex;
+    }
+
     /**
      * @return signature
      */
@@ -114,13 +121,6 @@ public final class ConstantNameAndType extends Constant {
         return signatureIndex;
     }
 
-    /**
-     * @param nameIndex the name index of this constant
-     */
-    public void setNameIndex(final int nameIndex) {
-        this.nameIndex = nameIndex;
-    }
-
     /**
      * @param signatureIndex the signature index in the constant pool of this type
      */

src/main/java/haidnor/jvm/bcel/classfile/ConstantPool.java

@@ -35,34 +35,6 @@ import java.util.Iterator;
  */
 public class ConstantPool implements Cloneable, Node, Iterable<Constant> {
 
-    private static String escape(final String str) {
-        final int len = str.length();
-        final StringBuilder buf = new StringBuilder(len + 5);
-        final char[] ch = str.toCharArray();
-        for (int i = 0; i < len; i++) {
-            switch (ch[i]) {
-            case '\n':
-                buf.append("\\n");
-                break;
-            case '\r':
-                buf.append("\\r");
-                break;
-            case '\t':
-                buf.append("\\t");
-                break;
-            case '\b':
-                buf.append("\\b");
-                break;
-            case '"':
-                buf.append("\\\"");
-                break;
-            default:
-                buf.append(ch[i]);
-            }
-        }
-        return buf.toString();
-    }
-
     private Constant[] constantPool;
 
     /**
@@ -100,6 +72,34 @@ public class ConstantPool implements Cloneable, Node, Iterable<Constant> {
         }
     }
 
+    private static String escape(final String str) {
+        final int len = str.length();
+        final StringBuilder buf = new StringBuilder(len + 5);
+        final char[] ch = str.toCharArray();
+        for (int i = 0; i < len; i++) {
+            switch (ch[i]) {
+                case '\n':
+                    buf.append("\\n");
+                    break;
+                case '\r':
+                    buf.append("\\r");
+                    break;
+                case '\t':
+                    buf.append("\\t");
+                    break;
+                case '\b':
+                    buf.append("\\b");
+                    break;
+                case '"':
+                    buf.append("\\\"");
+                    break;
+                default:
+                    buf.append(ch[i]);
+            }
+        }
+        return buf.toString();
+    }
+
     /**
      * Called by objects that are traversing the nodes of the tree implicitly defined by the contents of a Java class. I.e., the hierarchy of methods, fields,
      * attributes, etc. spawns a tree of objects.
@@ -249,8 +249,8 @@ public class ConstantPool implements Cloneable, Node, Iterable<Constant> {
      *
      * @param index Index in constant pool
      * @return Constant value
-     * @see Constant
      * @throws ClassFormatException if index is invalid
+     * @see Constant
      */
     @SuppressWarnings("unchecked")
     public <T extends Constant> T getConstant(final int index) throws ClassFormatException {
@@ -263,8 +263,8 @@ public class ConstantPool implements Cloneable, Node, Iterable<Constant> {
      * @param index Index in constant pool
      * @param tag   Tag of expected constant, i.e., its type
      * @return Constant value
-     * @see Constant
      * @throws ClassFormatException if constant type does not match tag
+     * @see Constant
      */
     @SuppressWarnings("unchecked")
     public <T extends Constant> T getConstant(final int index, final byte tag) throws ClassFormatException {
@@ -277,8 +277,8 @@ public class ConstantPool implements Cloneable, Node, Iterable<Constant> {
      * @param index Index in constant pool
      * @param tag   Tag of expected constant, i.e., its type
      * @return Constant value
-     * @see Constant
      * @throws ClassFormatException if constant type does not match tag
+     * @see Constant
      * @since 6.6.0
      */
     public <T extends Constant> T getConstant(final int index, final byte tag, final Class<T> castTo) throws ClassFormatException {
@@ -296,8 +296,8 @@ public class ConstantPool implements Cloneable, Node, Iterable<Constant> {
      * @param index  Index in constant pool
      * @param castTo The {@link Constant} subclass to cast to.
      * @return Constant value
-     * @see Constant
      * @throws ClassFormatException if index is invalid
+     * @see Constant
      * @since 6.6.0
      */
     public <T extends Constant> T getConstant(final int index, final Class<T> castTo) throws ClassFormatException {
@@ -326,8 +326,8 @@ public class ConstantPool implements Cloneable, Node, Iterable<Constant> {
      *
      * @param index Index in constant pool
      * @return ConstantInteger value
-     * @see ConstantInteger
      * @throws ClassFormatException if constant type does not match tag
+     * @see ConstantInteger
      */
     public ConstantInteger getConstantInteger(final int index) {
         return getConstant(index, Const.CONSTANT_Integer, ConstantInteger.class);
@@ -341,6 +341,13 @@ public class ConstantPool implements Cloneable, Node, Iterable<Constant> {
         return constantPool;
     }
 
+    /**
+     * @param constantPool
+     */
+    public void setConstantPool(final Constant[] constantPool) {
+        this.constantPool = constantPool;
+    }
+
     /**
      * Gets string from constant pool and bypass the indirection of 'ConstantClass' and 'ConstantString' objects. I.e. these classes have an index field that
      * points to another entry of the constant pool of type 'ConstantUtf8' which contains the real data.
@@ -348,9 +355,9 @@ public class ConstantPool implements Cloneable, Node, Iterable<Constant> {
      * @param index Index in constant pool
      * @param tag   Tag of expected constant, either ConstantClass or ConstantString
      * @return Contents of string reference
+     * @throws IllegalArgumentException if tag is invalid
      * @see ConstantClass
      * @see ConstantString
-     * @throws IllegalArgumentException if tag is invalid
      */
     public String getConstantString(final int index, final byte tag) throws IllegalArgumentException {
         int i;
@@ -386,8 +393,8 @@ public class ConstantPool implements Cloneable, Node, Iterable<Constant> {
      *
      * @param index Index in constant pool
      * @return ConstantUtf8 value
-     * @see ConstantUtf8
      * @throws ClassFormatException if constant type does not match tag
+     * @see ConstantUtf8
      */
     public ConstantUtf8 getConstantUtf8(final int index) throws ClassFormatException {
         return getConstant(index, Const.CONSTANT_Utf8, ConstantUtf8.class);
@@ -412,13 +419,6 @@ public class ConstantPool implements Cloneable, Node, Iterable<Constant> {
         constantPool[index] = constant;
     }
 
-    /**
-     * @param constantPool
-     */
-    public void setConstantPool(final Constant[] constantPool) {
-        this.constantPool = constantPool;
-    }
-
     /**
      * @return String representation.
      */
@@ -430,4 +430,164 @@ public class ConstantPool implements Cloneable, Node, Iterable<Constant> {
         }
         return buf.toString();
     }
+
+
+    // ---------------------------------------------- haidnorJVM
+
+    public ConstantFieldref getConstantFieldref(int constantFieldrefIndex) {
+        return getConstant(constantFieldrefIndex);
+    }
+
+    public ConstantMethodref getConstantMethodref(int constantMethodrefIndex) {
+        return getConstant(constantMethodrefIndex);
+    }
+
+    public ConstantClass getConstantClass(int constantClassIndex) {
+        return getConstant(constantClassIndex);
+    }
+
+    public ConstantNameAndType getConstantNameAndType(int constantNameAndTypeIndex) {
+        return getConstant(constantNameAndTypeIndex);
+    }
+
+
+    // ConstantClass ---------------------------------------------------------------------------------------------------
+
+    /**
+     * 获取长类名, 例如 java/lang/String
+     */
+    public String constantClass_ClassName(final ConstantClass constantClass) {
+        ConstantUtf8 constantUtf8 = getConstant(constantClass.getNameIndex());
+        return constantUtf8.getBytes();
+    }
+
+    /**
+     * 获取长类名, 例如 java/lang/String
+     */
+    public String constantClass_ClassName(int constantClassIndex) {
+        ConstantClass constantClass = getConstant(constantClassIndex);
+        return constantClass_ClassName(constantClass);
+    }
+
+
+    // ConstantFieldref ------------------------------------------------------------------------------------------------
+
+    /**
+     * 获取字段所处于Java类的类名, 例如 java/lang/String
+     */
+    public String constantFieldref_ClassName(final ConstantFieldref constantFieldref) {
+        ConstantClass constClass = getConstant(constantFieldref.getClassIndex());
+        return (String) constClass.getConstantValue(this);
+    }
+
+    /**
+     * 获取字段所处于Java类的类名, 例如 java/lang/String
+     */
+    public String constantFieldref_ClassName(int constantFieldrefIndex) {
+        ConstantFieldref constantFieldref = getConstantFieldref(constantFieldrefIndex);
+        return constantFieldref_ClassName(constantFieldref);
+    }
+
+    /**
+     * 获取字段名称
+     */
+    public String getFieldName(final ConstantFieldref constantFieldref) {
+        ConstantNameAndType constNameAndType = getConstant(constantFieldref.getNameAndTypeIndex());
+        return constNameAndType.getName(this);
+    }
+
+    /**
+     * 获取字段名称
+     */
+    public String getFieldName(int constantFieldrefIndex) {
+        ConstantFieldref constantFieldref = getConstantFieldref(constantFieldrefIndex);
+        return getFieldName(constantFieldref);
+    }
+
+    /**
+     * 获取字段类型签名
+     */
+    public String getFieldSignature(final ConstantFieldref constantFieldref) {
+        ConstantNameAndType constNameAndType = getConstant(constantFieldref.getNameAndTypeIndex());
+        return constNameAndType.getSignature(this);
+    }
+
+    /**
+     * 获取字段类型签名
+     */
+    public String getFieldSignature(int constantFieldrefIndex) {
+        ConstantFieldref constantFieldref = getConstantFieldref(constantFieldrefIndex);
+        return getFieldSignature(constantFieldref);
+    }
+
+    // ConstantMethodref -----------------------------------------------------------------------------------------------
+
+    /**
+     * 获取方法所处于Java类的类名
+     * 名称使用/分割,例如 haidnor/jvm/test/instruction/references/NEW
+     */
+    public String constantMethodref_ClassName(final ConstantMethodref methodref) {
+        ConstantClass constClass = getConstant(methodref.getClassIndex());
+        return (String) constClass.getConstantValue(this);
+    }
+
+    /**
+     * 获取方法名
+     */
+    public String constantMethodref_MethodName(final ConstantMethodref methodref) {
+        ConstantNameAndType constNameAndType = getConstant(methodref.getNameAndTypeIndex());
+        return constNameAndType.getName(this);
+    }
+
+    /**
+     * 获取方法签名
+     */
+    public String constantMethodref_MethodSignature(final ConstantMethodref methodref) {
+        ConstantNameAndType constNameAndType = getConstant(methodref.getNameAndTypeIndex());
+        return constNameAndType.getSignature(this);
+    }
+
+    // ConstantInterfaceMethodref -----------------------------------------------------------------------------------------------
+
+    public String constantInterfaceMethodref_ClassName(final ConstantInterfaceMethodref methodref) {
+        ConstantClass constClass = getConstant(methodref.getClassIndex());
+        return (String) constClass.getConstantValue(this);
+    }
+
+    /**
+     * 获取方法名
+     */
+    public String constantInterfaceMethodref_MethodName(final ConstantInterfaceMethodref methodref) {
+        ConstantNameAndType constNameAndType = getConstant(methodref.getNameAndTypeIndex());
+        return constNameAndType.getName(this);
+    }
+
+    /**
+     * 获取方法签名
+     */
+    public String constantInterfaceMethodref_MethodSignature(final ConstantInterfaceMethodref methodref) {
+        ConstantNameAndType constNameAndType = getConstant(methodref.getNameAndTypeIndex());
+        return constNameAndType.getSignature(this);
+    }
+
+
+    // ConstantNameAndType -----------------------------------------------------------------------------------------------
+
+    /**
+     * ConstantNameAndType
+     */
+    public ConstantNameAndType constantNameAndType(int constantNameAndTypeIndex) {
+        return getConstant(constantNameAndTypeIndex);
+    }
+
+    public String constantNameAndType_name(int constantNameAndTypeIndex) {
+        ConstantNameAndType constantNameAndType = constantNameAndType(constantNameAndTypeIndex);
+        return constantNameAndType.getName(this);
+    }
+
+    public String constantNameAndType_signature(int constantNameAndTypeIndex) {
+        ConstantNameAndType constantNameAndType = constantNameAndType(constantNameAndTypeIndex);
+        return constantNameAndType.getSignature(this);
+    }
+
 }

src/main/java/haidnor/jvm/bcel/classfile/ConstantUtf8.java

@@ -57,47 +57,53 @@ import java.util.Objects;
  */
 public final class ConstantUtf8 extends Constant {
 
-    private static class Cache {
+    private static final String SYS_PROP_CACHE_MAX_ENTRIES = "bcel.maxcached";
-
+    private static final String SYS_PROP_CACHE_MAX_ENTRY_SIZE = "bcel.maxcached.size";
-        private static final boolean BCEL_STATISTICS = Boolean.getBoolean(SYS_PROP_STATISTICS);
+    private static final String SYS_PROP_STATISTICS = "bcel.statistics";
-        private static final int MAX_ENTRIES = Integer.getInteger(SYS_PROP_CACHE_MAX_ENTRIES, 0).intValue();
-        private static final int INITIAL_CAPACITY = (int) (MAX_ENTRIES / 0.75);
-
-        private static final HashMap<String, ConstantUtf8> CACHE = new LinkedHashMap<String, ConstantUtf8>(INITIAL_CAPACITY, 0.75f, true) {
-
-            private static final long serialVersionUID = -8506975356158971766L;
-
-            @Override
-            protected boolean removeEldestEntry(final Map.Entry<String, ConstantUtf8> eldest) {
-                return size() > MAX_ENTRIES;
-            }
-        };
-
-        // Set the size to 0 or below to skip caching entirely
-        private static final int MAX_ENTRY_SIZE = Integer.getInteger(SYS_PROP_CACHE_MAX_ENTRY_SIZE, 200).intValue();
-
-        static boolean isEnabled() {
-            return Cache.MAX_ENTRIES > 0 && MAX_ENTRY_SIZE > 0;
-        }
-
-    }
-
     // TODO these should perhaps be AtomicInt?
     private static volatile int considered;
     private static volatile int created;
     private static volatile int hits;
     private static volatile int skipped;
 
-    private static final String SYS_PROP_CACHE_MAX_ENTRIES = "bcel.maxcached";
-    private static final String SYS_PROP_CACHE_MAX_ENTRY_SIZE = "bcel.maxcached.size";
-    private static final String SYS_PROP_STATISTICS = "bcel.statistics";
-
     static {
         if (Cache.BCEL_STATISTICS) {
             Runtime.getRuntime().addShutdownHook(new Thread(ConstantUtf8::printStats));
         }
     }
 
+    private final String value;
+
+    /**
+     * Initializes from another object.
+     *
+     * @param constantUtf8 the value.
+     */
+    public ConstantUtf8(final ConstantUtf8 constantUtf8) {
+        this(constantUtf8.getBytes());
+    }
+
+    /**
+     * Initializes instance from file data.
+     *
+     * @param dataInput Input stream
+     * @throws IOException if an I/O error occurs.
+     */
+    ConstantUtf8(final DataInput dataInput) throws IOException {
+        super(Const.CONSTANT_Utf8);
+        value = dataInput.readUTF();
+        created++;
+    }
+
+    /**
+     * @param value Data
+     */
+    public ConstantUtf8(final String value) {
+        super(Const.CONSTANT_Utf8);
+        this.value = Objects.requireNonNull(value, "value");
+        created++;
+    }
+
     /**
      * Clears the cache.
      *
@@ -178,38 +184,6 @@ public final class ConstantUtf8 extends Constant {
                 Cache.MAX_ENTRY_SIZE);
     }
 
-    private final String value;
-
-    /**
-     * Initializes from another object.
-     *
-     * @param constantUtf8 the value.
-     */
-    public ConstantUtf8(final ConstantUtf8 constantUtf8) {
-        this(constantUtf8.getBytes());
-    }
-
-    /**
-     * Initializes instance from file data.
-     *
-     * @param dataInput Input stream
-     * @throws IOException if an I/O error occurs.
-     */
-    ConstantUtf8(final DataInput dataInput) throws IOException {
-        super(Const.CONSTANT_Utf8);
-        value = dataInput.readUTF();
-        created++;
-    }
-
-    /**
-     * @param value Data
-     */
-    public ConstantUtf8(final String value) {
-        super(Const.CONSTANT_Utf8);
-        this.value = Objects.requireNonNull(value, "value");
-        created++;
-    }
-
     /**
      * Called by objects that are traversing the nodes of the tree implicitly defined by the contents of a Java class.
      * I.e., the hierarchy of methods, fields, attributes, etc. spawns a tree of objects.
@@ -256,4 +230,29 @@ public final class ConstantUtf8 extends Constant {
     public String toString() {
         return super.toString() + "(\"" + Utility.replace(value, "\n", "\\n") + "\")";
     }
+
+    private static class Cache {
+
+        private static final boolean BCEL_STATISTICS = Boolean.getBoolean(SYS_PROP_STATISTICS);
+        private static final int MAX_ENTRIES = Integer.getInteger(SYS_PROP_CACHE_MAX_ENTRIES, 0).intValue();
+        private static final int INITIAL_CAPACITY = (int) (MAX_ENTRIES / 0.75);
+
+        private static final HashMap<String, ConstantUtf8> CACHE = new LinkedHashMap<String, ConstantUtf8>(INITIAL_CAPACITY, 0.75f, true) {
+
+            private static final long serialVersionUID = -8506975356158971766L;
+
+            @Override
+            protected boolean removeEldestEntry(final Map.Entry<String, ConstantUtf8> eldest) {
+                return size() > MAX_ENTRIES;
+            }
+        };
+
+        // Set the size to 0 or below to skip caching entirely
+        private static final int MAX_ENTRY_SIZE = Integer.getInteger(SYS_PROP_CACHE_MAX_ENTRY_SIZE, 200).intValue();
+
+        static boolean isEnabled() {
+            return Cache.MAX_ENTRIES > 0 && MAX_ENTRY_SIZE > 0;
+        }
+
+    }
 }

src/main/java/haidnor/jvm/bcel/classfile/ConstantValue.java

@@ -34,6 +34,7 @@ import java.io.IOException;
  *   u2 constantvalue_index;
  * }
  * </pre>
+ *
  * @see Attribute
  */
 public final class ConstantValue extends Attribute {

src/main/java/haidnor/jvm/bcel/classfile/DescendingVisitor.java

@@ -153,7 +153,9 @@ public class DescendingVisitor implements Visitor {
         stack.pop();
     }
 
-    /** @since 6.3 */
+    /**
+     * @since 6.3
+     */
     @Override
     public void visitConstantDynamic(final ConstantDynamic obj) {
         stack.push(obj);
@@ -206,7 +208,9 @@ public class DescendingVisitor implements Visitor {
         stack.pop();
     }
 
-    /** @since 6.0 */
+    /**
+     * @since 6.0
+     */
     @Override
     public void visitConstantMethodHandle(final ConstantMethodHandle obj) {
         stack.push(obj);
@@ -221,7 +225,9 @@ public class DescendingVisitor implements Visitor {
         stack.pop();
     }
 
-    /** @since 6.0 */
+    /**
+     * @since 6.0
+     */
     @Override
     public void visitConstantMethodType(final ConstantMethodType obj) {
         stack.push(obj);
@@ -229,7 +235,9 @@ public class DescendingVisitor implements Visitor {
         stack.pop();
     }
 
-    /** @since 6.1 */
+    /**
+     * @since 6.1
+     */
     @Override
     public void visitConstantModule(final ConstantModule obj) {
         stack.push(obj);
@@ -244,7 +252,9 @@ public class DescendingVisitor implements Visitor {
         stack.pop();
     }
 
-    /** @since 6.1 */
+    /**
+     * @since 6.1
+     */
     @Override
     public void visitConstantPackage(final ConstantPackage obj) {
         stack.push(obj);
@@ -408,7 +418,9 @@ public class DescendingVisitor implements Visitor {
         stack.pop();
     }
 
-    /** @since 6.4.0 */
+    /**
+     * @since 6.4.0
+     */
     @Override
     public void visitModule(final Module obj) {
         stack.push(obj);
@@ -420,7 +432,9 @@ public class DescendingVisitor implements Visitor {
         stack.pop();
     }
 
-    /** @since 6.4.0 */
+    /**
+     * @since 6.4.0
+     */
     @Override
     public void visitModuleExports(final ModuleExports obj) {
         stack.push(obj);
@@ -428,7 +442,9 @@ public class DescendingVisitor implements Visitor {
         stack.pop();
     }
 
-    /** @since 6.4.0 */
+    /**
+     * @since 6.4.0
+     */
     @Override
     public void visitModuleMainClass(final ModuleMainClass obj) {
         stack.push(obj);
@@ -436,7 +452,9 @@ public class DescendingVisitor implements Visitor {
         stack.pop();
     }
 
-    /** @since 6.4.0 */
+    /**
+     * @since 6.4.0
+     */
     @Override
     public void visitModuleOpens(final ModuleOpens obj) {
         stack.push(obj);
@@ -444,7 +462,9 @@ public class DescendingVisitor implements Visitor {
         stack.pop();
     }
 
-    /** @since 6.4.0 */
+    /**
+     * @since 6.4.0
+     */
     @Override
     public void visitModulePackages(final ModulePackages obj) {
         stack.push(obj);
@@ -452,7 +472,9 @@ public class DescendingVisitor implements Visitor {
         stack.pop();
     }
 
-    /** @since 6.4.0 */
+    /**
+     * @since 6.4.0
+     */
     @Override
     public void visitModuleProvides(final ModuleProvides obj) {
         stack.push(obj);
@@ -460,7 +482,9 @@ public class DescendingVisitor implements Visitor {
         stack.pop();
     }
 
-    /** @since 6.4.0 */
+    /**
+     * @since 6.4.0
+     */
     @Override
     public void visitModuleRequires(final ModuleRequires obj) {
         stack.push(obj);
@@ -468,7 +492,9 @@ public class DescendingVisitor implements Visitor {
         stack.pop();
     }
 
-    /** @since 6.4.0 */
+    /**
+     * @since 6.4.0
+     */
     @Override
     public void visitNestHost(final NestHost obj) {
         stack.push(obj);
@@ -476,7 +502,9 @@ public class DescendingVisitor implements Visitor {
         stack.pop();
     }
 
-    /** @since 6.4.0 */
+    /**
+     * @since 6.4.0
+     */
     @Override
     public void visitNestMembers(final NestMembers obj) {
         stack.push(obj);
@@ -494,7 +522,9 @@ public class DescendingVisitor implements Visitor {
         stack.pop();
     }
 
-    /** @since 6.0 */
+    /**
+     * @since 6.0
+     */
     @Override
     public void visitParameterAnnotationEntry(final ParameterAnnotationEntry obj) {
         stack.push(obj);

src/main/java/haidnor/jvm/bcel/classfile/ElementValue.java

@@ -46,6 +46,7 @@ import java.io.IOException;
  *    } value;
  * }
  * </pre>
+ *
  * @since 6.0
  */
 public abstract class ElementValue {
@@ -63,6 +64,21 @@ public abstract class ElementValue {
     public static final byte PRIMITIVE_LONG = 'J';
     public static final byte PRIMITIVE_SHORT = 'S';
     public static final byte PRIMITIVE_BOOLEAN = 'Z';
+    /**
+     * @deprecated (since 6.0) will be made private and final; do not access directly, use getter
+     */
+    @java.lang.Deprecated
+    protected int type; // TODO should be final
+    /**
+     * @deprecated (since 6.0) will be made private and final; do not access directly, use getter
+     */
+    @java.lang.Deprecated
+    protected ConstantPool cpool; // TODO should be final
+
+    protected ElementValue(final int type, final ConstantPool cpool) {
+        this.type = type;
+        this.cpool = cpool;
+    }
 
     /**
      * Reads an {@code element_value} as an {@code ElementValue}.
@@ -129,25 +145,11 @@ public abstract class ElementValue {
         }
     }
 
-    /**
-     * @deprecated (since 6.0) will be made private and final; do not access directly, use getter
-     */
-    @java.lang.Deprecated
-    protected int type; // TODO should be final
-    /**
-     * @deprecated (since 6.0) will be made private and final; do not access directly, use getter
-     */
-    @java.lang.Deprecated
-    protected ConstantPool cpool; // TODO should be final
-
-    protected ElementValue(final int type, final ConstantPool cpool) {
-        this.type = type;
-        this.cpool = cpool;
-    }
-
     public abstract void dump(DataOutputStream dos) throws IOException;
 
-    /** @since 6.0 */
+    /**
+     * @since 6.0
+     */
     final ConstantPool getConstantPool() {
         return cpool;
     }
@@ -156,7 +158,9 @@ public abstract class ElementValue {
         return type;
     }
 
-    /** @since 6.0 */
+    /**
+     * @since 6.0
+     */
     final int getType() {
         return type;
     }

src/main/java/haidnor/jvm/bcel/classfile/EmptyVisitor.java

@@ -235,47 +235,65 @@ public class EmptyVisitor implements Visitor {
     public void visitMethodParameters(final MethodParameters obj) {
     }
 
-    /** @since 6.4.0 */
+    /**
+     * @since 6.4.0
+     */
     @Override
     public void visitModule(final Module obj) {
     }
 
-    /** @since 6.4.0 */
+    /**
+     * @since 6.4.0
+     */
     @Override
     public void visitModuleExports(final ModuleExports obj) {
     }
 
-    /** @since 6.4.0 */
+    /**
+     * @since 6.4.0
+     */
     @Override
     public void visitModuleMainClass(final ModuleMainClass obj) {
     }
 
-    /** @since 6.4.0 */
+    /**
+     * @since 6.4.0
+     */
     @Override
     public void visitModuleOpens(final ModuleOpens obj) {
     }
 
-    /** @since 6.4.0 */
+    /**
+     * @since 6.4.0
+     */
     @Override
     public void visitModulePackages(final ModulePackages obj) {
     }
 
-    /** @since 6.4.0 */
+    /**
+     * @since 6.4.0
+     */
     @Override
     public void visitModuleProvides(final ModuleProvides obj) {
     }
 
-    /** @since 6.4.0 */
+    /**
+     * @since 6.4.0
+     */
     @Override
     public void visitModuleRequires(final ModuleRequires obj) {
     }
 
-    /** @since 6.4.0 */
+    /**
+     * @since 6.4.0
+     */
     @Override
     public void visitNestHost(final NestHost obj) {
     }
 
-    /** @since 6.4.0 */
+    /**
+     * @since 6.4.0
+     */
     @Override
     public void visitNestMembers(final NestMembers obj) {
     }

src/main/java/haidnor/jvm/bcel/classfile/EnclosingMethod.java

@@ -5,9 +5,9 @@
  * The ASF licenses this file to You under the Apache License, Version 2.0
  * (the "License"); you may not use this file except in compliance with
  * the License.  You may obtain a copy of the License at
- *
+ * <p>
  * http://www.apache.org/licenses/LICENSE-2.0
- *
+ * <p>
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -81,6 +81,10 @@ public class EnclosingMethod extends Attribute {
         return classIndex;
     }
 
+    public final void setEnclosingClassIndex(final int idx) {
+        classIndex = idx;
+    }
+
     public final ConstantNameAndType getEnclosingMethod() {
         if (methodIndex == 0) {
             return null;
@@ -92,10 +96,6 @@ public class EnclosingMethod extends Attribute {
         return methodIndex;
     }
 
-    public final void setEnclosingClassIndex(final int idx) {
-        classIndex = idx;
-    }
-
     public final void setEnclosingMethodIndex(final int idx) {
         methodIndex = idx;
     }

src/main/java/haidnor/jvm/bcel/classfile/ExceptionTable.java

@@ -40,6 +40,7 @@ import java.util.Arrays;
  *   u2 exception_index_table[number_of_exceptions];
  * }
  * </pre>
+ *
  * @see Code
  */
 public final class ExceptionTable extends Attribute {
@@ -132,6 +133,14 @@ public final class ExceptionTable extends Attribute {
         return exceptionIndexTable;
     }
 
+    /**
+     * @param exceptionIndexTable the list of exception indexes Also redefines number_of_exceptions according to table
+     *                            length.
+     */
+    public void setExceptionIndexTable(final int[] exceptionIndexTable) {
+        this.exceptionIndexTable = exceptionIndexTable != null ? exceptionIndexTable : ArrayUtils.EMPTY_INT_ARRAY;
+    }
+
     /**
      * @return class names of thrown exceptions
      */
@@ -148,14 +157,6 @@ public final class ExceptionTable extends Attribute {
         return exceptionIndexTable == null ? 0 : exceptionIndexTable.length;
     }
 
-    /**
-     * @param exceptionIndexTable the list of exception indexes Also redefines number_of_exceptions according to table
-     *        length.
-     */
-    public void setExceptionIndexTable(final int[] exceptionIndexTable) {
-        this.exceptionIndexTable = exceptionIndexTable != null ? exceptionIndexTable : ArrayUtils.EMPTY_INT_ARRAY;
-    }
-
     /**
      * @return String representation, i.e., a list of thrown exceptions.
      */

src/main/java/haidnor/jvm/bcel/classfile/FieldOrMethod.java

@@ -50,16 +50,13 @@ public abstract class FieldOrMethod extends AccessFlags implements Cloneable, No
      */
     @java.lang.Deprecated
     protected int attributes_count; // No. of attributes
-
-    // @since 6.0
-    private AnnotationEntry[] annotationEntries; // annotations defined on the field or method
-
     /**
      * @deprecated (since 6.0) will be made private; do not access directly, use getter/setter
      */
     @java.lang.Deprecated
     protected ConstantPool constant_pool;
-
+    // @since 6.0
+    private AnnotationEntry[] annotationEntries; // annotations defined on the field or method
     private String signatureAttributeString;
     private boolean searchedForSignatureAttribute;
 
@@ -173,6 +170,14 @@ public abstract class FieldOrMethod extends AccessFlags implements Cloneable, No
         return attributes;
     }
 
+    /**
+     * @param attributes Collection of object attributes.
+     */
+    public final void setAttributes(final Attribute[] attributes) {
+        this.attributes = attributes;
+        this.attributes_count = attributes != null ? attributes.length : 0; // init deprecated field
+    }
+
     /**
      * @return Constant pool used by this object.
      */
@@ -180,6 +185,13 @@ public abstract class FieldOrMethod extends AccessFlags implements Cloneable, No
         return constant_pool;
     }
 
+    /**
+     * @param constantPool Constant pool to be used for this object.
+     */
+    public final void setConstantPool(final ConstantPool constantPool) {
+        this.constant_pool = constantPool;
+    }
+
     /**
      * Hunts for a signature attribute on the member and returns its contents. So where the 'regular' signature may be
      * (Ljava/util/Vector;)V the signature attribute may in fact say 'Ljava/lang/Vector<Ljava/lang/String>;' Coded for
@@ -215,6 +227,13 @@ public abstract class FieldOrMethod extends AccessFlags implements Cloneable, No
         return name_index;
     }
 
+    /**
+     * @param nameIndex Index in constant pool of object's name.
+     */
+    public final void setNameIndex(final int nameIndex) {
+        this.name_index = nameIndex;
+    }
+
     /**
      * @return String representation of object's type signature (java style)
      */
@@ -229,28 +248,6 @@ public abstract class FieldOrMethod extends AccessFlags implements Cloneable, No
         return signature_index;
     }
 
-    /**
-     * @param attributes Collection of object attributes.
-     */
-    public final void setAttributes(final Attribute[] attributes) {
-        this.attributes = attributes;
-        this.attributes_count = attributes != null ? attributes.length : 0; // init deprecated field
-    }
-
-    /**
-     * @param constantPool Constant pool to be used for this object.
-     */
-    public final void setConstantPool(final ConstantPool constantPool) {
-        this.constant_pool = constantPool;
-    }
-
-    /**
-     * @param nameIndex Index in constant pool of object's name.
-     */
-    public final void setNameIndex(final int nameIndex) {
-        this.name_index = nameIndex;
-    }
-
     /**
      * @param signatureIndex Index in constant pool of field signature.
      */

src/main/java/haidnor/jvm/bcel/classfile/InnerClass.java

@@ -110,27 +110,6 @@ public final class InnerClass implements Cloneable, Node {
         return innerAccessFlags;
     }
 
-    /**
-     * @return class index of inner class.
-     */
-    public int getInnerClassIndex() {
-        return innerClassIndex;
-    }
-
-    /**
-     * @return name index of inner class.
-     */
-    public int getInnerNameIndex() {
-        return innerNameIndex;
-    }
-
-    /**
-     * @return class index of outer class.
-     */
-    public int getOuterClassIndex() {
-        return outerClassIndex;
-    }
-
     /**
      * @param innerAccessFlags access flags for this inner class
      */
@@ -138,6 +117,13 @@ public final class InnerClass implements Cloneable, Node {
         this.innerAccessFlags = innerAccessFlags;
     }
 
+    /**
+     * @return class index of inner class.
+     */
+    public int getInnerClassIndex() {
+        return innerClassIndex;
+    }
+
     /**
      * @param innerClassIndex index into the constant pool for this class
      */
@@ -145,6 +131,13 @@ public final class InnerClass implements Cloneable, Node {
         this.innerClassIndex = innerClassIndex;
     }
 
+    /**
+     * @return name index of inner class.
+     */
+    public int getInnerNameIndex() {
+        return innerNameIndex;
+    }
+
     /**
      * @param innerNameIndex index into the constant pool for this class's name
      */
@@ -152,6 +145,13 @@ public final class InnerClass implements Cloneable, Node {
         this.innerNameIndex = innerNameIndex;
     }
 
+    /**
+     * @return class index of outer class.
+     */
+    public int getOuterClassIndex() {
+        return outerClassIndex;
+    }
+
     /**
      * @param outerClassIndex index into the constant pool for the owning class
      */

src/main/java/haidnor/jvm/bcel/classfile/InnerClasses.java

@@ -127,11 +127,6 @@ public final class InnerClasses extends Attribute implements Iterable<InnerClass
         return innerClasses;
     }
 
-    @Override
-    public Iterator<InnerClass> iterator() {
-        return Stream.of(innerClasses).iterator();
-    }
-
     /**
      * @param innerClasses the array of inner classes
      */
@@ -139,6 +134,11 @@ public final class InnerClasses extends Attribute implements Iterable<InnerClass
         this.innerClasses = innerClasses != null ? innerClasses : EMPTY_INNER_CLASSE_ARRAY;
     }
 
+    @Override
+    public Iterator<InnerClass> iterator() {
+        return Stream.of(innerClasses).iterator();
+    }
+
     /**
      * @return String representation.
      */

src/main/java/haidnor/jvm/bcel/classfile/JavaClass.java

@@ -23,6 +23,9 @@ import haidnor.jvm.bcel.util.BCELComparator;
 import haidnor.jvm.bcel.util.ClassQueue;
 import haidnor.jvm.bcel.util.Repository;
 import haidnor.jvm.bcel.util.SyntheticRepository;
+import haidnor.jvm.classloader.JVMClassLoader;
+import lombok.Getter;
+import lombok.Setter;
 import org.apache.commons.lang3.ArrayUtils;
 
 import java.io.*;
@@ -71,41 +74,10 @@ public class JavaClass extends AccessFlags implements Cloneable, Node, Comparabl
             return THIS.getClassName().hashCode();
         }
     };
-
-    /*
-     * Print debug information depending on 'JavaClass.debug'
-     */
-    static void Debug(final String str) {
-        if (debug) {
-            System.out.println(str);
-        }
-    }
-
-    /**
-     * @return Comparison strategy object
-     */
-    public static BCELComparator getComparator() {
-        return bcelComparator;
-    }
-
-    private static String indent(final Object obj) {
-        final StringTokenizer tokenizer = new StringTokenizer(obj.toString(), "\n");
-        final StringBuilder buf = new StringBuilder();
-        while (tokenizer.hasMoreTokens()) {
-            buf.append("\t").append(tokenizer.nextToken()).append("\n");
-        }
-        return buf.toString();
-    }
-
-    /**
-     * @param comparator Comparison strategy object
-     */
-    public static void setComparator(final BCELComparator comparator) {
-        bcelComparator = comparator;
-    }
-
-    private String fileName;
     private final String packageName;
+    @Getter
+    private final Map<String, JavaField> staticJavaFieldMap = new HashMap<>();
+    private String fileName;
     private String sourceFileName = "<Unknown>";
     private int classNameIndex;
     private int superclassNameIndex;
@@ -119,21 +91,23 @@ public class JavaClass extends AccessFlags implements Cloneable, Node, Comparabl
     private JavaField[] fields; // Fields, i.e., variables of class
     private JavaMethod[] methods; // methods defined in the class
     private Attribute[] attributes; // attributes defined in the class
-
     private AnnotationEntry[] annotations; // annotations defined on the class
     private byte source = HEAP; // Generated in memory
-
     private boolean isAnonymous;
-
     private boolean isNested;
-
     private boolean computedNestedTypeStatus;
 
+    // ---------------------------------------------- haidnorJVM >
     /**
      * In cases where we go ahead and create something, use the default SyntheticRepository, because we don't know any
      * better.
      */
     private transient Repository repository = SyntheticRepository.getInstance();
+    @Getter
+    @Setter
+    private JVMClassLoader JVMClassLoader;
+
+    // ---------------------------------------------- haidnorJVM <
 
     /**
      * Constructor gets all contents as arguments.
@@ -229,6 +203,45 @@ public class JavaClass extends AccessFlags implements Cloneable, Node, Comparabl
             final String str = constantPool.getConstantString(interfaces[i], Const.CONSTANT_Class);
             interfaceNames[i] = Utility.compactClassName(str, false);
         }
+
+        // 初始化静态字段
+        for (JavaField field : getFields()) {
+            if (field.isStatic()) {
+                staticJavaFieldMap.put(field.getName(), field);
+            }
+        }
+    }
+
+    /*
+     * Print debug information depending on 'JavaClass.debug'
+     */
+    static void Debug(final String str) {
+        if (debug) {
+            System.out.println(str);
+        }
+    }
+
+    /**
+     * @return Comparison strategy object
+     */
+    public static BCELComparator getComparator() {
+        return bcelComparator;
+    }
+
+    /**
+     * @param comparator Comparison strategy object
+     */
+    public static void setComparator(final BCELComparator comparator) {
+        bcelComparator = comparator;
+    }
+
+    private static String indent(final Object obj) {
+        final StringTokenizer tokenizer = new StringTokenizer(obj.toString(), "\n");
+        final StringBuilder buf = new StringBuilder();
+        while (tokenizer.hasMoreTokens()) {
+            buf.append("\t").append(tokenizer.nextToken()).append("\n");
+        }
+        return buf.toString();
     }
 
     /**
@@ -429,6 +442,13 @@ public class JavaClass extends AccessFlags implements Cloneable, Node, Comparabl
         return attributes;
     }
 
+    /**
+     * @param attributes .
+     */
+    public void setAttributes(final Attribute[] attributes) {
+        this.attributes = attributes;
+    }
+
     /**
      * @return class in binary format
      */
@@ -449,6 +469,13 @@ public class JavaClass extends AccessFlags implements Cloneable, Node, Comparabl
         return className;
     }
 
+    /**
+     * @param className .
+     */
+    public void setClassName(final String className) {
+        this.className = className;
+    }
+
     /**
      * @return Class name index.
      */
@@ -456,6 +483,13 @@ public class JavaClass extends AccessFlags implements Cloneable, Node, Comparabl
         return classNameIndex;
     }
 
+    /**
+     * @param classNameIndex .
+     */
+    public void setClassNameIndex(final int classNameIndex) {
+        this.classNameIndex = classNameIndex;
+    }
+
     /**
      * @return Constant pool.
      */
@@ -463,6 +497,13 @@ public class JavaClass extends AccessFlags implements Cloneable, Node, Comparabl
         return constantPool;
     }
 
+    /**
+     * @param constantPool .
+     */
+    public void setConstantPool(final ConstantPool constantPool) {
+        this.constantPool = constantPool;
+    }
+
     /**
      * @return Fields, i.e., variables of the class. Like the JVM spec mandates for the classfile format, these fields are
      * those specific to this class, and not those of the superclass or superinterfaces.
@@ -471,6 +512,13 @@ public class JavaClass extends AccessFlags implements Cloneable, Node, Comparabl
         return fields;
     }
 
+    /**
+     * @param fields .
+     */
+    public void setFields(final JavaField[] fields) {
+        this.fields = fields;
+    }
+
     /**
      * @return File name of class, aka SourceFile attribute value
      */
@@ -478,6 +526,13 @@ public class JavaClass extends AccessFlags implements Cloneable, Node, Comparabl
         return fileName;
     }
 
+    /**
+     * Set File name of class, aka SourceFile attribute value
+     */
+    public void setFileName(final String fileName) {
+        this.fileName = fileName;
+    }
+
     /**
      * @return Indices in constant pool of implemented interfaces.
      */
@@ -492,6 +547,13 @@ public class JavaClass extends AccessFlags implements Cloneable, Node, Comparabl
         return interfaceNames;
     }
 
+    /**
+     * @param interfaceNames .
+     */
+    public void setInterfaceNames(final String[] interfaceNames) {
+        this.interfaceNames = interfaceNames;
+    }
+
     /**
      * Get interfaces directly implemented by this JavaClass.
      *
@@ -506,6 +568,13 @@ public class JavaClass extends AccessFlags implements Cloneable, Node, Comparabl
         return classes;
     }
 
+    /**
+     * @param interfaces .
+     */
+    public void setInterfaces(final int[] interfaces) {
+        this.interfaces = interfaces;
+    }
+
     /**
      * @return Major number of class file version.
      */
@@ -513,6 +582,13 @@ public class JavaClass extends AccessFlags implements Cloneable, Node, Comparabl
         return major;
     }
 
+    /**
+     * @param major .
+     */
+    public void setMajor(final int major) {
+        this.major = major;
+    }
+
     /**
      * @return A {@link JavaMethod} corresponding to java.lang.reflect.Method if any
      */
@@ -532,6 +608,13 @@ public class JavaClass extends AccessFlags implements Cloneable, Node, Comparabl
         return methods;
     }
 
+    /**
+     * @param methods .
+     */
+    public void setMethods(final JavaMethod[] methods) {
+        this.methods = methods;
+    }
+
     /**
      * @return Minor number of class file version.
      */
@@ -539,6 +622,13 @@ public class JavaClass extends AccessFlags implements Cloneable, Node, Comparabl
         return minor;
     }
 
+    /**
+     * @param minor .
+     */
+    public void setMinor(final int minor) {
+        this.minor = minor;
+    }
+
     /**
      * @return Package name.
      */
@@ -554,6 +644,13 @@ public class JavaClass extends AccessFlags implements Cloneable, Node, Comparabl
         return repository;
     }
 
+    /**
+     * Sets the ClassRepository which loaded the JavaClass. Should be called immediately after parsing is done.
+     */
+    public void setRepository(final Repository repository) { // TODO make protected?
+        this.repository = repository;
+    }
+
     /**
      * @return returns either HEAP (generated), FILE, or ZIP
      */
@@ -568,6 +665,13 @@ public class JavaClass extends AccessFlags implements Cloneable, Node, Comparabl
         return sourceFileName;
     }
 
+    /**
+     * Set absolute path to file this class was read from.
+     */
+    public void setSourceFileName(final String sourceFileName) {
+        this.sourceFileName = sourceFileName;
+    }
+
     /**
      * Gets the source file path including the package path.
      *
@@ -618,6 +722,13 @@ public class JavaClass extends AccessFlags implements Cloneable, Node, Comparabl
         return superclassName;
     }
 
+    /**
+     * @param superclassName .
+     */
+    public void setSuperclassName(final String superclassName) {
+        this.superclassName = superclassName;
+    }
+
     /**
      * @return Class name index.
      */
@@ -625,6 +736,17 @@ public class JavaClass extends AccessFlags implements Cloneable, Node, Comparabl
         return superclassNameIndex;
     }
 
+    /**
+     * @param superclassNameIndex .
+     */
+    public void setSuperclassNameIndex(final int superclassNameIndex) {
+        this.superclassNameIndex = superclassNameIndex;
+    }
+
+    public JavaField getStaticField(String filedName) {
+        return staticJavaFieldMap.get(filedName);
+    }
+
     /**
      * Return value as defined by given BCELComparator strategy. By default return the hashcode of the class name.
      *
@@ -700,111 +822,6 @@ public class JavaClass extends AccessFlags implements Cloneable, Node, Comparabl
         return (super.getAccessFlags() & Const.ACC_SUPER) != 0;
     }
 
-    /**
-     * @param attributes .
-     */
-    public void setAttributes(final Attribute[] attributes) {
-        this.attributes = attributes;
-    }
-
-    /**
-     * @param className .
-     */
-    public void setClassName(final String className) {
-        this.className = className;
-    }
-
-    /**
-     * @param classNameIndex .
-     */
-    public void setClassNameIndex(final int classNameIndex) {
-        this.classNameIndex = classNameIndex;
-    }
-
-    /**
-     * @param constantPool .
-     */
-    public void setConstantPool(final ConstantPool constantPool) {
-        this.constantPool = constantPool;
-    }
-
-    /**
-     * @param fields .
-     */
-    public void setFields(final JavaField[] fields) {
-        this.fields = fields;
-    }
-
-    /**
-     * Set File name of class, aka SourceFile attribute value
-     */
-    public void setFileName(final String fileName) {
-        this.fileName = fileName;
-    }
-
-    /**
-     * @param interfaceNames .
-     */
-    public void setInterfaceNames(final String[] interfaceNames) {
-        this.interfaceNames = interfaceNames;
-    }
-
-    /**
-     * @param interfaces .
-     */
-    public void setInterfaces(final int[] interfaces) {
-        this.interfaces = interfaces;
-    }
-
-    /**
-     * @param major .
-     */
-    public void setMajor(final int major) {
-        this.major = major;
-    }
-
-    /**
-     * @param methods .
-     */
-    public void setMethods(final JavaMethod[] methods) {
-        this.methods = methods;
-    }
-
-    /**
-     * @param minor .
-     */
-    public void setMinor(final int minor) {
-        this.minor = minor;
-    }
-
-    /**
-     * Sets the ClassRepository which loaded the JavaClass. Should be called immediately after parsing is done.
-     */
-    public void setRepository(final Repository repository) { // TODO make protected?
-        this.repository = repository;
-    }
-
-    /**
-     * Set absolute path to file this class was read from.
-     */
-    public void setSourceFileName(final String sourceFileName) {
-        this.sourceFileName = sourceFileName;
-    }
-
-    /**
-     * @param superclassName .
-     */
-    public void setSuperclassName(final String superclassName) {
-        this.superclassName = superclassName;
-    }
-
-    /**
-     * @param superclassNameIndex .
-     */
-    public void setSuperclassNameIndex(final int superclassNameIndex) {
-        this.superclassNameIndex = superclassNameIndex;
-    }
-
     /**
      * @return String representing class contents.
      */
@@ -859,4 +876,20 @@ public class JavaClass extends AccessFlags implements Cloneable, Node, Comparabl
         }
         return buf.toString();
     }
+
+    // ---------------------------------------------- haidnorJVM
+
+    /**
+     * 获取 main 方法
+     */
+    public JavaMethod getMainMethod() {
+        for (JavaMethod javaMethod : getMethods()) {
+            if (javaMethod.toString().startsWith("public static void main(String[] args)")) {
+                return javaMethod;
+            }
+        }
+        return null;
+    }
+
+
 }

src/main/java/haidnor/jvm/bcel/classfile/JavaField.java

@@ -28,7 +28,7 @@ import java.util.Objects;
  * This class represents the field info structure, i.e., the representation for a variable in the class. See JVM
  * specification for details.
  */
-public final class JavaField extends FieldOrMethod {
+public class JavaField extends FieldOrMethod {
 
     /**
      * Empty array constant.
@@ -36,7 +36,10 @@ public final class JavaField extends FieldOrMethod {
      * @since 6.6.0
      */
     public static final JavaField[] EMPTY_ARRAY = {};
-
+    /**
+     * Empty array.
+     */
+    static final JavaField[] EMPTY_FIELD_ARRAY = {};
     private static BCELComparator bcelComparator = new BCELComparator() {
 
         @Override
@@ -52,25 +55,14 @@ public final class JavaField extends FieldOrMethod {
             return THIS.getSignature().hashCode() ^ THIS.getName().hashCode();
         }
     };
-
     /**
-     * Empty array.
+     * 值类型
      */
-    static final JavaField[] EMPTY_FIELD_ARRAY = {};
+    private int valueType;
-
     /**
-     * @return Comparison strategy object
+     * 值
      */
-    public static BCELComparator getComparator() {
+    private Object value;
-        return bcelComparator;
-    }
-
-    /**
-     * @param comparator Comparison strategy object
-     */
-    public static void setComparator(final BCELComparator comparator) {
-        bcelComparator = comparator;
-    }
 
     /**
      * Construct object from file stream.
@@ -102,6 +94,20 @@ public final class JavaField extends FieldOrMethod {
         super(accessFlags, nameIndex, signatureIndex, attributes, constantPool);
     }
 
+    /**
+     * @return Comparison strategy object
+     */
+    public static BCELComparator getComparator() {
+        return bcelComparator;
+    }
+
+    /**
+     * @param comparator Comparison strategy object
+     */
+    public static void setComparator(final BCELComparator comparator) {
+        bcelComparator = comparator;
+    }
+
     /**
      * Called by objects that are traversing the nodes of the tree implicitly defined by the contents of a Java class.
      * I.e., the hierarchy of methods, fields, attributes, etc. spawns a tree of objects.
@@ -150,6 +156,22 @@ public final class JavaField extends FieldOrMethod {
         return Type.getReturnType(getSignature());
     }
 
+    public int getValueType() {
+        return valueType;
+    }
+
+    public void setValueType(int valueType) {
+        this.valueType = valueType;
+    }
+
+    public Object getValue() {
+        return value;
+    }
+
+    public void setValue(Object value) {
+        this.value = value;
+    }
+
     /**
      * Return value as defined by given BCELComparator strategy. By default return the hashcode of the field's name XOR
      * signature.

src/main/java/haidnor/jvm/bcel/classfile/JavaMethod.java

@@ -27,7 +27,7 @@ import java.util.Objects;
  * This class represents the method info structure, i.e., the representation for a method in the class. See JVM
  * specification for details. A method has access flags, a name, a signature and a number of attributes.
  */
-public final class JavaMethod extends FieldOrMethod {
+public class JavaMethod extends FieldOrMethod {
 
     /**
      * Empty array constant.
@@ -35,7 +35,10 @@ public final class JavaMethod extends FieldOrMethod {
      * @since 6.6.0
      */
     public static final JavaMethod[] EMPTY_ARRAY = {};
-
+    /**
+     * Empty array.
+     */
+    static final JavaMethod[] EMPTY_METHOD_ARRAY = {};
     private static BCELComparator bcelComparator = new BCELComparator() {
 
         @Override
@@ -51,26 +54,6 @@ public final class JavaMethod extends FieldOrMethod {
             return THIS.getSignature().hashCode() ^ THIS.getName().hashCode();
         }
     };
-
-    /**
-     * Empty array.
-     */
-    static final JavaMethod[] EMPTY_METHOD_ARRAY = {};
-
-    /**
-     * @return Comparison strategy object
-     */
-    public static BCELComparator getComparator() {
-        return bcelComparator;
-    }
-
-    /**
-     * @param comparator Comparison strategy object
-     */
-    public static void setComparator(final BCELComparator comparator) {
-        bcelComparator = comparator;
-    }
-
     // annotations defined on the parameters of a method
     private ParameterAnnotationEntry[] parameterAnnotationEntries;
 
@@ -112,6 +95,20 @@ public final class JavaMethod extends FieldOrMethod {
         super(c);
     }
 
+    /**
+     * @return Comparison strategy object
+     */
+    public static BCELComparator getComparator() {
+        return bcelComparator;
+    }
+
+    /**
+     * @param comparator Comparison strategy object
+     */
+    public static void setComparator(final BCELComparator comparator) {
+        bcelComparator = comparator;
+    }
+
     /**
      * Called by objects that are traversing the nodes of the tree implicitly defined by the contents of a Java class.
      * I.e., the hierarchy of methods, fields, attributes, etc. spawns a tree of objects.

src/main/java/haidnor/jvm/bcel/classfile/LineNumber.java

@@ -32,10 +32,14 @@ public final class LineNumber implements Cloneable, Node {
 
     static final LineNumber[] EMPTY_ARRAY = {};
 
-    /** Program Counter (PC) corresponds to line */
+    /**
+     * Program Counter (PC) corresponds to line
+     */
     private int startPc;
 
-    /** number in source file */
+    /**
+     * number in source file
+     */
     private int lineNumber;
 
     /**
@@ -107,13 +111,6 @@ public final class LineNumber implements Cloneable, Node {
         return lineNumber & 0xffff;
     }
 
-    /**
-     * @return PC in code
-     */
-    public int getStartPC() {
-        return startPc & 0xffff;
-    }
-
     /**
      * @param lineNumber the source line number
      */
@@ -121,6 +118,13 @@ public final class LineNumber implements Cloneable, Node {
         this.lineNumber = (short) lineNumber;
     }
 
+    /**
+     * @return PC in code
+     */
+    public int getStartPC() {
+        return startPc & 0xffff;
+    }
+
     /**
      * @param startPc the pc for this line number
      */

src/main/java/haidnor/jvm/bcel/classfile/LineNumberTable.java

@@ -126,6 +126,13 @@ public final class LineNumberTable extends Attribute implements Iterable<LineNum
         return lineNumberTable;
     }
 
+    /**
+     * @param lineNumberTable the line number entries for this table
+     */
+    public void setLineNumberTable(final LineNumber[] lineNumberTable) {
+        this.lineNumberTable = lineNumberTable;
+    }
+
     /**
      * Map byte code positions to source code lines.
      *
@@ -181,13 +188,6 @@ public final class LineNumberTable extends Attribute implements Iterable<LineNum
         return Stream.of(lineNumberTable).iterator();
     }
 
-    /**
-     * @param lineNumberTable the line number entries for this table
-     */
-    public void setLineNumberTable(final LineNumber[] lineNumberTable) {
-        this.lineNumberTable = lineNumberTable;
-    }
-
     /**
      * @return String representation.
      */

src/main/java/haidnor/jvm/bcel/classfile/LocalVariable.java

@@ -36,35 +36,28 @@ import java.io.IOException;
 public final class LocalVariable implements Cloneable, Node {
 
     static final LocalVariable[] EMPTY_ARRAY = {};
-
-    /**
-     * Range in which the variable is valid.
-     */
-    private int startPc;
-
-    private int length;
-
-    /**
-     * Index in constant pool of variable name.
-     */
-    private int nameIndex;
-
-    /**
-     * Technically, a decscriptor_index for a local variable table entry and a signatureIndex for a local variable type table entry. Index of variable signature
-     */
-    private int signatureIndex;
-
-    /*
-     * Variable is index'th local variable on this method's frame.
-     */
-    private int index;
-
-    private ConstantPool constantPool;
-
     /**
      * Never changes; used to match up with LocalVariableTypeTable entries.
      */
     private final int origIndex;
+    /**
+     * Range in which the variable is valid.
+     */
+    private int startPc;
+    private int length;
+    /**
+     * Index in constant pool of variable name.
+     */
+    private int nameIndex;
+    /**
+     * Technically, a decscriptor_index for a local variable table entry and a signatureIndex for a local variable type table entry. Index of variable signature
+     */
+    private int signatureIndex;
+    /*
+     * Variable is index'th local variable on this method's frame.
+     */
+    private int index;
+    private ConstantPool constantPool;
 
     /**
      * Constructs object from file stream.
@@ -164,6 +157,13 @@ public final class LocalVariable implements Cloneable, Node {
         return constantPool;
     }
 
+    /**
+     * @param constantPool Constant pool to be used for this object.
+     */
+    public void setConstantPool(final ConstantPool constantPool) {
+        this.constantPool = constantPool;
+    }
+
     /**
      * @return index of register where variable is stored
      */
@@ -171,6 +171,13 @@ public final class LocalVariable implements Cloneable, Node {
         return index;
     }
 
+    /**
+     * @param index the index in the local variable table of this variable
+     */
+    public void setIndex(final int index) { // TODO unused
+        this.index = index;
+    }
+
     /**
      * @return Variable is valid within getStartPC() .. getStartPC()+getLength()
      */
@@ -178,6 +185,13 @@ public final class LocalVariable implements Cloneable, Node {
         return length;
     }
 
+    /**
+     * @param length the length of this local variable
+     */
+    public void setLength(final int length) {
+        this.length = length;
+    }
+
     /**
      * @return Variable name.
      */
@@ -192,6 +206,13 @@ public final class LocalVariable implements Cloneable, Node {
         return nameIndex;
     }
 
+    /**
+     * @param nameIndex the index into the constant pool for the name of this variable
+     */
+    public void setNameIndex(final int nameIndex) { // TODO unused
+        this.nameIndex = nameIndex;
+    }
+
     /**
      * @return index of register where variable was originally stored
      */
@@ -213,41 +234,6 @@ public final class LocalVariable implements Cloneable, Node {
         return signatureIndex;
     }
 
-    /**
-     * @return Start of range where the variable is valid
-     */
-    public int getStartPC() {
-        return startPc;
-    }
-
-    /**
-     * @param constantPool Constant pool to be used for this object.
-     */
-    public void setConstantPool(final ConstantPool constantPool) {
-        this.constantPool = constantPool;
-    }
-
-    /**
-     * @param index the index in the local variable table of this variable
-     */
-    public void setIndex(final int index) { // TODO unused
-        this.index = index;
-    }
-
-    /**
-     * @param length the length of this local variable
-     */
-    public void setLength(final int length) {
-        this.length = length;
-    }
-
-    /**
-     * @param nameIndex the index into the constant pool for the name of this variable
-     */
-    public void setNameIndex(final int nameIndex) { // TODO unused
-        this.nameIndex = nameIndex;
-    }
-
     /**
      * @param signatureIndex the index into the constant pool for the signature of this variable
      */
@@ -255,6 +241,13 @@ public final class LocalVariable implements Cloneable, Node {
         this.signatureIndex = signatureIndex;
     }
 
+    /**
+     * @return Start of range where the variable is valid
+     */
+    public int getStartPC() {
+        return startPc;
+    }
+
     /**
      * @param startPc Specify range where the local variable is valid.
      */

src/main/java/haidnor/jvm/bcel/classfile/LocalVariableTable.java

@@ -116,11 +116,8 @@ public class LocalVariableTable extends Attribute implements Iterable<LocalVaria
     }
 
     /**
-     *
      * @param index the variable slot
-     *
      * @return the first LocalVariable that matches the slot or null if not found
-     *
      * @deprecated since 5.2 because multiple variables can share the same slot, use getLocalVariable(int index, int pc)
      * instead.
      */
@@ -135,10 +132,8 @@ public class LocalVariableTable extends Attribute implements Iterable<LocalVaria
     }
 
     /**
-     *
      * @param index the variable slot
      * @param pc    the current pc that this variable is alive
-     *
      * @return the LocalVariable that matches or null if not found
      */
     public final LocalVariable getLocalVariable(final int index, final int pc) {
@@ -161,6 +156,10 @@ public class LocalVariableTable extends Attribute implements Iterable<LocalVaria
         return localVariableTable;
     }
 
+    public final void setLocalVariableTable(final LocalVariable[] localVariableTable) {
+        this.localVariableTable = localVariableTable;
+    }
+
     public final int getTableLength() {
         return localVariableTable == null ? 0 : localVariableTable.length;
     }
@@ -170,10 +169,6 @@ public class LocalVariableTable extends Attribute implements Iterable<LocalVaria
         return Stream.of(localVariableTable).iterator();
     }
 
-    public final void setLocalVariableTable(final LocalVariable[] localVariableTable) {
-        this.localVariableTable = localVariableTable;
-    }
-
     /**
      * @return String representation.
      */

src/main/java/haidnor/jvm/bcel/classfile/LocalVariableTypeTable.java

@@ -5,9 +5,9 @@
  * The ASF licenses this file to You under the Apache License, Version 2.0
  * (the "License"); you may not use this file except in compliance with
  * the License.  You may obtain a copy of the License at
- *
+ * <p>
  * http://www.apache.org/licenses/LICENSE-2.0
- *
+ * <p>
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

src/main/java/haidnor/jvm/bcel/classfile/MethodParameter.java

@@ -32,10 +32,14 @@ import java.io.IOException;
  */
 public class MethodParameter implements Cloneable, Node {
 
-    /** Index of the CONSTANT_Utf8_info structure in the constant_pool table representing the name of the parameter */
+    /**
+     * Index of the CONSTANT_Utf8_info structure in the constant_pool table representing the name of the parameter
+     */
     private int nameIndex;
 
-    /** The access flags */
+    /**
+     * The access flags
+     */
     private int accessFlags;
 
     public MethodParameter() {
@@ -85,10 +89,18 @@ public class MethodParameter implements Cloneable, Node {
         return accessFlags;
     }
 
+    public void setAccessFlags(final int accessFlags) {
+        this.accessFlags = accessFlags;
+    }
+
     public int getNameIndex() {
         return nameIndex;
     }
 
+    public void setNameIndex(final int nameIndex) {
+        this.nameIndex = nameIndex;
+    }
+
     /**
      * Returns the name of the parameter.
      */
@@ -110,12 +122,4 @@ public class MethodParameter implements Cloneable, Node {
     public boolean isSynthetic() {
         return (accessFlags & Const.ACC_SYNTHETIC) != 0;
     }
-
-    public void setAccessFlags(final int accessFlags) {
-        this.accessFlags = accessFlags;
-    }
-
-    public void setNameIndex(final int nameIndex) {
-        this.nameIndex = nameIndex;
-    }
 }

src/main/java/haidnor/jvm/bcel/classfile/MethodParameters.java

@@ -86,12 +86,12 @@ public class MethodParameters extends Attribute implements Iterable<MethodParame
         return parameters;
     }
 
+    public void setParameters(final MethodParameter[] parameters) {
+        this.parameters = parameters;
+    }
+
     @Override
     public Iterator<MethodParameter> iterator() {
         return Stream.of(parameters).iterator();
     }
-
-    public void setParameters(final MethodParameter[] parameters) {
-        this.parameters = parameters;
-    }
 }

src/main/java/haidnor/jvm/bcel/classfile/Module.java

@@ -43,12 +43,11 @@ public final class Module extends Attribute {
     private final int moduleNameIndex;
     private final int moduleFlags;
     private final int moduleVersionIndex;
-
+    private final int usesCount;
+    private final int[] usesIndex;
     private ModuleRequires[] requiresTable;
     private ModuleExports[] exportsTable;
     private ModuleOpens[] opensTable;
-    private final int usesCount;
-    private final int[] usesIndex;
     private ModuleProvides[] providesTable;
 
     /**

src/main/java/haidnor/jvm/bcel/classfile/ModulePackages.java

@@ -129,6 +129,13 @@ public final class ModulePackages extends Attribute {
         return packageIndexTable;
     }
 
+    /**
+     * @param packageIndexTable the list of package indexes Also redefines number_of_packages according to table length.
+     */
+    public void setPackageIndexTable(final int[] packageIndexTable) {
+        this.packageIndexTable = packageIndexTable != null ? packageIndexTable : ArrayUtils.EMPTY_INT_ARRAY;
+    }
+
     /**
      * @return string array of package names
      */
@@ -138,13 +145,6 @@ public final class ModulePackages extends Attribute {
         return names;
     }
 
-    /**
-     * @param packageIndexTable the list of package indexes Also redefines number_of_packages according to table length.
-     */
-    public void setPackageIndexTable(final int[] packageIndexTable) {
-        this.packageIndexTable = packageIndexTable != null ? packageIndexTable : ArrayUtils.EMPTY_INT_ARRAY;
-    }
-
     /**
      * @return String representation, i.e., a list of packages.
      */

src/main/java/haidnor/jvm/bcel/classfile/NestMembers.java

@@ -123,6 +123,13 @@ public final class NestMembers extends Attribute {
         return classes;
     }
 
+    /**
+     * @param classes the list of class indexes Also redefines number_of_classes according to table length.
+     */
+    public void setClasses(final int[] classes) {
+        this.classes = classes != null ? classes : ArrayUtils.EMPTY_INT_ARRAY;
+    }
+
     /**
      * @return string array of class names
      */
@@ -139,13 +146,6 @@ public final class NestMembers extends Attribute {
         return classes.length;
     }
 
-    /**
-     * @param classes the list of class indexes Also redefines number_of_classes according to table length.
-     */
-    public void setClasses(final int[] classes) {
-        this.classes = classes != null ? classes : ArrayUtils.EMPTY_INT_ARRAY;
-    }
-
     /**
      * @return String representation, i.e., a list of classes.
      */

src/main/java/haidnor/jvm/bcel/classfile/PMGClass.java

@@ -107,6 +107,13 @@ public final class PMGClass extends Attribute {
         return pmgClassIndex;
     }
 
+    /**
+     * @param pmgClassIndex
+     */
+    public void setPMGClassIndex(final int pmgClassIndex) {
+        this.pmgClassIndex = pmgClassIndex;
+    }
+
     /**
      * @return PMG class name.
      */
@@ -121,20 +128,6 @@ public final class PMGClass extends Attribute {
         return pmgIndex;
     }
 
-    /**
-     * @return PMG name.
-     */
-    public String getPMGName() {
-        return super.getConstantPool().getConstantUtf8(pmgIndex).getBytes();
-    }
-
-    /**
-     * @param pmgClassIndex
-     */
-    public void setPMGClassIndex(final int pmgClassIndex) {
-        this.pmgClassIndex = pmgClassIndex;
-    }
-
     /**
      * @param pmgIndex
      */
@@ -142,6 +135,13 @@ public final class PMGClass extends Attribute {
         this.pmgIndex = pmgIndex;
     }
 
+    /**
+     * @return PMG name.
+     */
+    public String getPMGName() {
+        return super.getConstantPool().getConstantUtf8(pmgIndex).getBytes();
+    }
+
     /**
      * @return String representation
      */

src/main/java/haidnor/jvm/bcel/classfile/ParameterAnnotationEntry.java

@@ -31,19 +31,6 @@ import java.util.List;
 public class ParameterAnnotationEntry implements Node {
 
     static final ParameterAnnotationEntry[] EMPTY_ARRAY = {};
-
-    public static ParameterAnnotationEntry[] createParameterAnnotationEntries(final Attribute[] attrs) {
-        // Find attributes that contain parameter annotation data
-        final List<ParameterAnnotationEntry> accumulatedAnnotations = new ArrayList<>(attrs.length);
-        for (final Attribute attribute : attrs) {
-            if (attribute instanceof ParameterAnnotations) {
-                final ParameterAnnotations runtimeAnnotations = (ParameterAnnotations) attribute;
-                Collections.addAll(accumulatedAnnotations, runtimeAnnotations.getParameterAnnotationEntries());
-            }
-        }
-        return accumulatedAnnotations.toArray(ParameterAnnotationEntry.EMPTY_ARRAY);
-    }
-
     private final AnnotationEntry[] annotationTable;
 
     /**
@@ -61,6 +48,18 @@ public class ParameterAnnotationEntry implements Node {
         }
     }
 
+    public static ParameterAnnotationEntry[] createParameterAnnotationEntries(final Attribute[] attrs) {
+        // Find attributes that contain parameter annotation data
+        final List<ParameterAnnotationEntry> accumulatedAnnotations = new ArrayList<>(attrs.length);
+        for (final Attribute attribute : attrs) {
+            if (attribute instanceof ParameterAnnotations) {
+                final ParameterAnnotations runtimeAnnotations = (ParameterAnnotations) attribute;
+                Collections.addAll(accumulatedAnnotations, runtimeAnnotations.getParameterAnnotationEntries());
+            }
+        }
+        return accumulatedAnnotations.toArray(ParameterAnnotationEntry.EMPTY_ARRAY);
+    }
+
     /**
      * Called by objects that are traversing the nodes of the tree implicitly defined by the contents of a Java class.
      * I.e., the hierarchy of methods, fields, attributes, etc. spawns a tree of objects.