如何停止正在运行的TimerTask
我正在尝试制作一个简单的计时器,该计时器在指定的秒数后发出提示音。我设法使其正常工作,但是TimerTask在蜂鸣声后继续运行。现在我停止执行吗?这是我的代码:
import java.util.Scanner;import java.util.Timer;
import java.util.TimerTask;
import java.awt.Toolkit;
class Alarm {
public static void main(String[] args) {
long delay;
Scanner scan = new Scanner(System.in);
System.out.print("Enter a delay in seconds: ");
delay = scan.nextInt()*1000;
Timer timer = new Timer();
TimerTask task = new TimerTask() {
@Override
public void run() {
Toolkit.getDefaultToolkit().beep();
}
};
timer.schedule(task, delay);
}
}
回答:
您需要通过调用以下方法来取消计时器
timer.cancel(); // Terminates this timer, discarding any currently scheduled tasks.timer.purge(); // Removes all cancelled tasks from this timer's task queue.
这将取消任务,因此可以执行以下操作:
import java.util.Scanner;import java.util.Timer;
import java.util.TimerTask;
import java.awt.Toolkit;
class Alarm {
private static boolean run = true;
public static void main(String[] args) {
long delay;
Scanner scan = new Scanner(System.in);
System.out.print("Enter a delay in seconds: ");
delay = scan.nextInt()*1000;
final Timer timer = new Timer();
final TimerTask task = new TimerTask() {
@Override
public void run() {
if(run) {
Toolkit.getDefaultToolkit().beep();
} else {
timer.cancel();
timer.purge();
}
}
};
timer.schedule(task, delay);
// set run to false here to stop the timer.
run = false;
}
}
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