counttimer.java

来自「自己做的一份在线考试系统」· Java 代码 · 共 24 行

package BeanPage;
import java.util.Date;
import java.util.TimerTask;
import java.util.Timer;
import javax.swing.JOptionPane;
public class countTimer extends TimerTask{
    public countTimer() {
    }
    int time = 1*60;
    int minutes = 0;
    int seconds = 1;
        public void run(){
            if(time>0){
                time--;
                minutes = time/60;
                seconds = time%60;
                System.out.print(minutes+":"+seconds);
            }
            else{
                JOptionPane.showMessageDialog(null,"时间到了，该交卷了！");
            }
        }
}