某类继承thread，同时实现runnable

package com.giserve.test;

public class ThreadTest {
    public static void main(String[] args) {
        new Thread(new Runnable() {

            @Override
            public void run() {
                while(true){
                    try {
                        Thread.sleep(1000);
                        System.out.println("Thread1::"+Thread.currentThread().getName());
                    } catch (InterruptedException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                }
            }
        }){
            @Override
            public void run() {
                while(true){
                    try {
                        Thread.sleep(1000);
                        System.out.println("Thread0::"+Thread.currentThread().getName());
                    } catch (InterruptedException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                }
            };
        }.start();
    }
}

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

@Override
public void run() {
    if (target != null) {
        target.run();
    }
}

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。