线程入门之sleep

package com.thread;
/**
 * <sleep:使线程休眠一些时间>
 * <功能详细描述>
 *
 * @author  95Yang
 */
public class Thread_sleep
{
    public static void main(String[] args)
    {
        ThreadSleep t = new ThreadSleep();
        t.run();
    }
}

class ThreadSleep extends Thread{
    public void run(){
        int i = 0;
        while (i<=20){
            System.out.println(i++);
            try
            {
                sleep(500);
            }
            catch (InterruptedException e)
            {
                e.printStackTrace();
            }
        }
    }
}

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