update IFEQ

src/main/java/haidnor/jvm/instruction/comparisons/IFEQ.java

@@ -19,16 +19,24 @@ public class IFEQ extends Instruction {
     @Override
     public void execute(Frame frame) {
         StackValue v1 = frame.pop();
-        if ((int) v1.getValue() == 0) {
+        if (v1.getValue() instanceof Boolean) {
-            super.setOffSet(offSet);
+            if (!((boolean) v1.getValue())) {
+                super.setOffSet(offSet);
+            } else {
+                super.setOffSet(3);
+            }
         } else {
-            super.setOffSet(3);
+            if ((int) v1.getValue() == 0) {
+                super.setOffSet(offSet);
+            } else {
+                super.setOffSet(3);
+            }
         }
     }
 
     @Override
     public String toString() {
-        return super.index() + " " + this.getClass().getSimpleName() + " "  + offSet;
+        return super.index() + " " + this.getClass().getSimpleName() + " " + offSet;
     }
 
 }

src/test/java/haidnor/jvm/test/TestJVM.java

@@ -92,6 +92,11 @@ public class TestJVM {
         runMainClass(demo_foreach.class);
     }
 
+    @Test
+    public void demo_foreach_2() throws Exception {
+        runMainClass(demo_foreach_2.class);
+    }
+
     @Test
     public void test_8() throws Exception {
         runMainClass(Demo8.class);

src/test/java/haidnor/jvm/test/demo/demo_foreach_2.java

@@ -0,0 +1,20 @@
+package haidnor.jvm.test.demo;
+
+import java.util.ArrayList;
+
+/**
+ * 需要添加启动参数
+ * --add-opens java.base/java.util=ALL-UNNAMED
+ */
+public class demo_foreach_2 {
+
+    public static void main(String[] args) {
+        ArrayList<Integer> list = new ArrayList<>();
+        list.add(1);
+        list.add(2);
+        for (Integer integer : list) {
+            System.out.println(integer);
+        }
+    }
+
+}