通过继承Thread类来创建线程

public class MyThread extends Thread 
{
    public void run(){
        for(int i=0;i<50;i++){
           try{ Thread.sleep(100);}catch(Exception e){}
           System.out.println(Thread.currentThread().getName()+" : "+i);
        }
    }
    public static void main(String[] args) 
    {
        MyThread t1 = new MyThread();
        t1.start();
        t1.run();//函数调用
    }
}