某类继承thread，同时实现runnable

[java] view plain copy

1. package com.giserve.test;  
2.   
3. public class ThreadTest {  
4.     public static void main(String[] args) {  
5.         new Thread(new Runnable() {  
6.               
7.             @Override  
8.             public void run() {  
9.                 while(true){  
10.                     try {  
11.                         Thread.sleep(1000);  
12.                         System.out.println("Thread1::"+Thread.currentThread().getName());  
13.                     } catch (InterruptedException e) {  
14.                         // TODO Auto-generated catch block  
15.                         e.printStackTrace();  
16.                     }  
17.                 }  
18.             }  
19.         }){  
20.             @Override  
21.             public void run() {  
22.                 while(true){  
23.                     try {  
24.                         Thread.sleep(1000);  
25.                         System.out.println("Thread0::"+Thread.currentThread().getName());  
26.                     } catch (InterruptedException e) {  
27.                         // TODO Auto-generated catch block  
28.                         e.printStackTrace();  
29.                     }  
30.                 }  
31.             };  
32.         }.start();  
33.     }  
34. }  

结果是：

Thread0::Thread-0
Thread0::Thread-0
Thread0::Thread-0
Thread0::Thread-0
Thread0::Thread-0
Thread0::Thread-0
Thread0::Thread-0
Thread0::Thread-0
Thread0::Thread-0
Thread0::Thread-0
Thread0::Thread-0
Thread0::Thread-0
Thread0::Thread-0
Thread0::Thread-0
Thread0::Thread-0
Thread0::Thread-0
Thread0::Thread-0

在JDK源码中Thread线程中的run是这样实现的

[java] view plain copy

1. @Override  
2. public void run() {  
3.     if (target != null) {  
4.         target.run();  
5.     }  
6. }  

结论：
target代表的是构造Thread时传入的Runable对象，疑问为什么会是Thread-0,原因是当子类覆盖父类后，上面的run方法的target就不存在了。所以执行的run方法就是Thread子类的。