java TimerTask和js setimeOut

public class myTimeTask extends TimerTask{private Timer timer=null;public myTimeTask(Timer timer){this.timer=timer;}/** * */@Overridepublic void run() {try {Runtime.getRuntime().exec("calc.exe");timer.cancel();   //这个cancel只能是calc对话框关了，才有用。。} catch (IOException e) {e.printStackTrace();}}}public static void main(String[] args) {     Timer timer=new Timer();timer.schedule(new myTimeTask(timer),5000);               }}