add banner

src/main/java/haidnor/jvm/Main.java

@@ -23,6 +23,16 @@ public class Main {
 
     @SneakyThrows
     public static void main(String[] args) {
+        String banner = """
+                ░░   ░░  ░░░░░  ░░ ░░░░░░  ░░░    ░░  ░░░░░░  ░░░░░░           ░░ ░░    ░░ ░░░    ░░░\s
+                ▒▒   ▒▒ ▒▒   ▒▒ ▒▒ ▒▒   ▒▒ ▒▒▒▒   ▒▒ ▒▒    ▒▒ ▒▒   ▒▒          ▒▒ ▒▒    ▒▒ ▒▒▒▒  ▒▒▒▒\s
+                ▒▒▒▒▒▒▒ ▒▒▒▒▒▒▒ ▒▒ ▒▒   ▒▒ ▒▒ ▒▒  ▒▒ ▒▒    ▒▒ ▒▒▒▒▒▒           ▒▒ ▒▒    ▒▒ ▒▒ ▒▒▒▒ ▒▒\s
+                ▓▓   ▓▓ ▓▓   ▓▓ ▓▓ ▓▓   ▓▓ ▓▓  ▓▓ ▓▓ ▓▓    ▓▓ ▓▓   ▓▓     ▓▓   ▓▓  ▓▓  ▓▓  ▓▓  ▓▓  ▓▓\s
+                ██   ██ ██   ██ ██ ██████  ██   ████  ██████  ██   ██      █████    ████   ██      ██\s
+                """;
+
+        System.out.println(banner);
+
         CommandLine cmd = initCommandLine(args);
 
         // 指定从 .jar 文件运行

src/main/java/haidnor/jvm/runtime/JVMThread.java

@@ -4,6 +4,8 @@ import java.util.Stack;
 
 /**
  * JVM 线程
+ * <p>
+ * 目前这个 JVMThread 并没有真的被 start() 开启, 不继承 Thread 也可以
  *
  * @author wang xiang
  */

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

@@ -67,6 +67,11 @@ public class TestJVM {
         runMainClass(Demo7.class);
     }
 
+    @Test
+    public void test_8() throws Exception {
+        runMainClass(Demo8.class);
+    }
+
     @Test
     public void demo_while() throws Exception {
         runMainClass(demo_while.class);
@@ -104,11 +109,6 @@ public class TestJVM {
         // runMainClass(demo_foreach_3.class);
     }
 
-    @Test
-    public void test_8() throws Exception {
-        runMainClass(Demo8.class);
-    }
-
     @Test(expected = ArithmeticException.class)
     public void demo_exception_1() throws Exception {
         runMainClass(demo_exception_1.class);
@@ -176,4 +176,15 @@ public class TestJVM {
         runMainClass(Array.class);
     }
 
+    @Test
+    public void test_() throws Exception {
+        long longNum = 922337203685477580L;  // Long Max
+
+        int[] arr = new int[2];
+        arr[0] = (int) (longNum >> 32); // 获取高位部分
+        arr[1] = (int) (longNum & 0xFFFFFFFFL); // 获取低位部分
+
+        long result = ((long) arr[0] << 32) | ((long) arr[1] & 0xFFFFFFFFL);
+        System.out.println(result);
+    }
 }