在前面的部分我们对字节码以及字节码中各个表的结构进行了一下概括, 这一节我们通过一个较为复杂的类进行字节码的分析, 分析的描述将按照字节码文件的结构顺序分析(见上一节)

类源代码

public class TestClass2 {
    String str = "Welcome";

    private int x = 5;

    public static Integer in = 10;

    public TestClass2 () {}

    public TestClass2 (int a) {
        System.out.println( a );
    }

    public static void main (String[] args) {
        TestClass2 testClass2 = new TestClass2();

        testClass2.setX(8);

        in = 20;

        if (in == 20) {
            int aaaa = 10;
        }
        int bbbb = 20;
    }

    public synchronized void setX (int x) {
        this.x = x;
    }

    private void test (String str) {
        synchronized (str) {
            System.out.println( "hello, world" );
        }
    }

    static {
        System.out.println( "hello, world" );
    }
}