我正在寻找一个 Java 计时器示例,并在 http://www.javaprogrammingforums.com/java-se-api-tutorials/883-how-use-timer-java.html找到了以下代码
但是,如果您运行该示例,尽管它确实打印 Timer stop now... 它不会返回到命令提示符。这至少是我使用 cmd.exe 在我的 Windows XP 机器上发生的情况。
为什么在这种情况下它不将控制权返回到提示符?
import java.util.Timer;
import java.util.TimerTask;
public class TimerSample {
public static void main(String[] args) {
//1- Taking an instance of Timer class.
Timer timer = new Timer("Printer");
//2- Taking an instance of class contains your repeated method.
MyTask t = new MyTask();
//TimerTask is a class implements Runnable interface so
//You have to override run method with your certain code black
//Second Parameter is the specified the Starting Time for your timer in
//MilliSeconds or Date
//Third Parameter is the specified the Period between consecutive
//calling for the method.
timer.schedule(t, 0, 2000);
}
}
class MyTask extends TimerTask {
//times member represent calling times.
private int times = 0;
public void run() {
times++;
if (times <= 5) {
System.out.println("I'm alive...");
} else {
System.out.println("Timer stops now...");
//Stop Timer.
this.cancel();
}
}
}