如何将Timer的秒数转换为hh:mm:ss？

Question

如果两次提出同样的问题被认为是垃圾邮件,我真的很抱歉,因为我已经在一小时前询问过反向计时器了.

但现在新的问题是,我再也无法引起任何人对这个问题的关注.我已经成功编码了计时器,感谢你们,但后来我试着将秒转换为hh:mm:ss格式,但它没有用.而不是继续前进到00:00:00.它只显示我编码的时间,就是这样.

这是我的代码.

import java.util.Timer;
import java.util.TimerTask;
public class countdown extends javax.swing.JFrame {


public countdown() {
    initComponents();
    Timer timer;

    timer = new Timer();
    timer.schedule(new DisplayCountdown(), 0, 1000);
}

class DisplayCountdown extends TimerTask {

      int seconds = 5;
      int hr = (int)(seconds/3600);
      int rem = (int)(seconds%3600);
      int mn = rem/60;
      int sec = rem%60;
      String hrStr = (hr<10 ? "0" : "")+hr;
      String mnStr = (mn<10 ? "0" : "")+mn;
      String secStr = (sec<10 ? "0" : "")+sec; 

      public void run() {
           if (seconds > 0) {
              lab.setText(hrStr+ " : "+mnStr+ " : "+secStr+"");
              seconds--;
           } else {

              lab.setText("Countdown finished");
              System.exit(0);
          }    
    }
}     
public static void main(String args[]) {
    new countdown().setVisible(true);
}  

Answer 1

移动你的计算

  int hr = seconds/3600;
  int rem = seconds%3600;
  int mn = rem/60;
  int sec = rem%60;
  String hrStr = (hr<10 ? "0" : "")+hr;
  String mnStr = (mn<10 ? "0" : "")+mn;
  String secStr = (sec<10 ? "0" : "")+sec; 

进入run方法.