定时器实现多线程

指定一个线程任务，指定何时执行，指定每隔多久执行一次。其中，任务TimerTask是实现了Runnabe接口的。

package com.roocon.thread.t2;

import java.util.Timer;
import java.util.TimerTask;

public class Demo5 {

    public static void main(String[] args) {
        Timer timer = new Timer();
        timer.schedule(new TimerTask() {
            @Override
            public void run() {
                System.out.println("timer is running");
            }
        }, 0, 1000);
    }
}

运行结果：

timer is running
timer is running
timer is running
timer is running