Question

似乎javac为匿名内部类生成$ n个文件，但哪个内部类被编译为$ 1.class。是否有任何优先级，javac将内部类编译为$ 1.class文件或是随机的？

    public static void main(String args[]) {

    Thread secondThread = new Thread(new Runnable() {

        @Override
        public void run() {
            System.out.println("Printing from second thread");

        }
    });

    Thread firstThread = new Thread(new Runnable() {

        @Override
        public void run() {
            System.out.println("Printing from first thread");

        }
    });

    firstThread.start();
    secondThread.start();

}

我发现firstThread成为Test $ 1.class（我使用javap -c来检查）所以我猜测它不是根据首先定义的内部类。那么创作的标准是什么？

javap -c输出

    Compiled from "Test.java"
class main.Test$1 implements java.lang.Runnable {
  main.Test$1();
    Code:
       0: aload_0       
       1: invokespecial #10                 // Method java/lang/Object."<init>":()V
       4: return        

  public void run();
    Code:
       0: getstatic     #17                 // Field java/lang/System.out:Ljava/io/PrintStream;
       3: ldc           #23                 // String Printing from first thread
       5: invokevirtual #25                 // Method java/io/PrintStream.println:(Ljava/lang/String;)V
       8: return        
}

Compiled from "Test.java"
class main.Test$2 implements java.lang.Runnable {
  main.Test$2();
    Code:
       0: aload_0       
       1: invokespecial #10                 // Method java/lang/Object."<init>":()V
       4: return        

  public void run();
    Code:
       0: getstatic     #17                 // Field java/lang/System.out:Ljava/io/PrintStream;
       3: ldc           #23                 // String Printing from second thread
       5: invokevirtual #25                 // Method java/io/PrintStream.println:(Ljava/lang/String;)V
       8: return        
}

上面你看到包含firstThread的Test $ 1，即使firstThread位于main()的稍后位置，这有什么原因吗？

javac生成$ n.class文件的优先级是什么？

0 个答案: