2019-04-1218:03:32

package 多线程.定时器Timer_重要;import java.util.Timer;import java.util.TimerTask;public class TimerDemo {    public static void main(String[] args) {        Timer timer = new Timer();        mytimeer mytime = new mytimeer(timer);        timer.schedule(mytime, 1000, 1000);    }}class mytimeer extends TimerTask {    Timer timer;    int a = 60;    public mytimeer(Timer timer) {        this.timer = timer;    }    @Override    public void run() {        System.out.println("爆炸倒计时" + a--);        if (a == 0) {            System.out.println("boom-----");            timer.cancel();//关闭        }    }}