计时器 Timer，计时任务 TimerTask

Timer timer = new Timer();//计时器
class MyTimerTask extends TimerTask {

@Override
public void run() {
// TODO Auto-generated method stub
System.out.print("啦");
}

}
timer.schedule(new TimerTask() {

@Override
public void run() {
// TODO Auto-generated method stub
System.out.print("轰");
new Timer().schedule(new MyTimerTask(),1000);//延迟1秒后执行MyTimerTask里的任务
}
},1000,2000);//延迟1秒后执行，此后以2秒为间隔周期，重复执行
while(true) {
try {
Thread.sleep(1000);
System.out.println(new Date().getSeconds());
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}