Question

i have a question , i have this timer code in java that when its executed it displays a count down timer on its own JFrame label, what i want to do is to display this timer on another JFrame form label without having to move the code to other classes.

I hope you can help me with this thanks lot guys .

this is the code for the Timer class:

import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.Timer;

public class TimerExample extends JFrame {

   final JLabel label;
   Timer countdownTimer;
   int timeRemaining = 10;

   public TimerExample() {
      setDefaultCloseOperation(EXIT_ON_CLOSE);
      setSize(200, 200);
      label = new JLabel(String.valueOf(timeRemaining), JLabel.CENTER);
      getContentPane().add(label);

      countdownTimer = new Timer(1000, new CountdownTimerListener());
      setVisible(true);
      countdownTimer.start();
   }

   class CountdownTimerListener implements ActionListener {
      public void actionPerformed(ActionEvent e) {
         if (--timeRemaining > 0) {
            label.setText(String.valueOf(timeRemaining));
         } else {
            label.setText("Time's up!");
            countdownTimer.stop();
         }
      }
   }

   public static void main(String[] args) {
      EventQueue.invokeLater(new Runnable() {
         public void run() {
            new TimerExample();
         }
      });
   }

}

thanks

Answer 1

Here it is,

Following is my TestTimer class which accepts a JLabel as input

public class TestTimer {
     private JLabel label;
     Timer countdownTimer;
     int timeRemaining = 10;

     public TestTimer(JLabel passedLabel) {
        countdownTimer = new Timer(1000, new CountdownTimerListener());
        this.label = passedLabel;
        countdownTimer.start();
     }

      class CountdownTimerListener implements ActionListener {
          public void actionPerformed(ActionEvent e) {
             if (--timeRemaining > 0) {
                 label.setText(String.valueOf(timeRemaining));
              } else {
                 label.setText("Time's up!");
                 countdownTimer.stop();
              }
          }
      }
  }

And here is another Main class which is actually extending a JFrame and showing a label in it,

public class TimerJFrame extends JFrame{    
    private static final long serialVersionUID = 1L;
    private JLabel label;

    public TimerJFrame() {
     setDefaultCloseOperation(EXIT_ON_CLOSE);
         setSize(200, 200);
         label = new JLabel("10", JLabel.CENTER);
         getContentPane().add(label);
         new TestTimer(label);
         setVisible(true);
    }

    public static void main(String[] args) {
      EventQueue.invokeLater(new Runnable() {
         public void run() {
            new TimerJFrame();
         }
      });
   }
}

Second Code passes a created JLabel to first class and first class uses it to show timer.