Countdown timer helppp

Question

I made a puzzle game in java Applet, and I need to add a timer that runs for 5 minutes where the player has to solve the puzzle within this time, if not a dialog box will appear asking to retry, so then I need the timer to start again.

Can someone tell me how can I code this.

  public void init (){
 String MINUTES = getParameter("minutes");
 if (MINUTES != null) remaining = Integer.parseInt(MINUTES) * 600000;
 else remaining = 600000; // 10 minutes by default

 // Create a JLabel to display remaining time, and set some PROPERTIES.
 label = new JLabel();
// label.setHorizontalAlignment(SwingConstants.CENTER );
// label.setOpaque(false); // So label draws the background color




 // Now add the label to the applet. Like JFrame and JDialog, JApplet
 // has a content pane that you add children to
  count.add(label);
  Puzframe.add(count,BorderLayout.SOUTH);


 // Obtain a NumberFormat object to convert NUMBER of minutes and
 // seconds to strings. Set it up to produce a leading 0 if necessary
 format = NumberFormat.getNumberInstance();
 format.setMinimumIntegerDigits(2); // pad with 0 if necessary

 // Specify a MouseListener to handle mouse events in the applet.
 // Note that the applet implements this interface itself


 // Create a timer to call the actionPerformed() method immediately,
 // and then every 1000 milliseconds. Note we don't START the timer yet.
 timer = new Timer(1000, this);
 timer.setInitialDelay(0); //
 timer.start(); }



public void start() { resume(); }



  //The browser calls this to stop the applet. It may be restarted      later.
  //The pause() method is defined below

void resume() {
  // Restore the time we're counting down from and restart the timer.
 lastUpdate = System.currentTimeMillis();
 timer.start(); // Start the timer
}`

//Pause the countdown



void updateDisplay() {
 long now = System.currentTimeMillis(); // current time in ms
 long elapsed = now - lastUpdate; // ms elapsed since last update
 remaining -= elapsed; // adjust remaining time
 lastUpdate = now; // remember this update time

 // Convert remaining milliseconds to mm:ss format and display
 if (remaining < 0) remaining = 0;
 int minutes = (int)(remaining/60000);
 int seconds = (int)((remaining)/1000);


 label.setText(format.format(minutes) + ":" + format.format(seconds));
 label.setForeground(new Color(251,251,254));
    label.setBackground(new Color(0,0,0));
 // If we've completed the countdown beep and display new page
 if (remaining == 0) {
     // Stop updating now.
     timer.stop();
 }

     count.add(label);

Puzframe.add(label,BorderLayout.SOUTH); }

This what I have so far, but my problem is that it doesn't appear in my game. I'm calling the updateDisplay() from actionPerformed

What have you tried so far? Show us some code for which you have a specific problem. — , May 26 '16 at 14:31

score 1 · Answer 1 · answered May 26 '16 at 15:27

Use Swing Timer it is made for such a scenario

//javax.swing.Timer
 timer = new Timer(4000, new ActionListener() {
   @Override
   public void actionPerformed(ActionEvent e) {
     JOptionPane.showMessageDialog(mainFrame,
             "End Of Game",
             "5 minutes has passed",
             JOptionPane.ERROR_MESSAGE);
   }
 });

I prepared a simple example to demonstrate it

Example

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class SwingControlDemo {

   private JFrame mainFrame;
   private JPanel controlPanel;
   private Timer timer;

  public SwingControlDemo(){
      prepareGUI();
   }

   public static void main(String[] args){
      SwingControlDemo swingControlDemo = new SwingControlDemo();  
      swingControlDemo.showEventDemo();       
   }

   private void prepareGUI(){
      mainFrame = new JFrame("Java SWING Examples");
      mainFrame.setSize(400,400);
      mainFrame.setLayout(new GridLayout(3, 1));

      mainFrame.addWindowListener(new WindowAdapter() {
         public void windowClosing(WindowEvent windowEvent){
           System.exit(0);
         }        
      });    
      controlPanel = new JPanel();
      controlPanel.setLayout(new FlowLayout());

      mainFrame.add(controlPanel);
      mainFrame.setVisible(true);

     //javax.swing.Timer
     timer = new Timer(4000, new ActionListener() {
       @Override
       public void actionPerformed(ActionEvent e) {
         JOptionPane.showMessageDialog(mainFrame,
                 "End Of Game",
                 "5 minutes has passed",
                 JOptionPane.ERROR_MESSAGE);
       }
     });
   }

   private void showEventDemo(){

      JButton okButton = new JButton("Start Game");

      okButton.setActionCommand("OK");

      okButton.addActionListener(new ButtonClickListener()); 

      controlPanel.add(okButton);

      mainFrame.setVisible(true);  
   }

   private class ButtonClickListener implements ActionListener{

      public void actionPerformed(ActionEvent e) {
        timer.start();
         String command = e.getActionCommand();  
         if( command.equals( "OK" ))  {
           System.out.println("Timer started");
         }
      }
   }
}

Countdown timer helppp

1 Answers1