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How do I close a JFrame ???

Posted on 2004-10-04
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Last Modified: 2008-02-26
Hi Experts,

   In the end following code, every time when the gameOver() is called, it creates a new Test(). Therefore, after several runs ... I got many Test() and many JFrame .... How do I close the previous one after a new one is created ??? many thanks !!!


public class Test extends JFrame implements KeyListener, ActionListener{
           
         // --- blah blah ....
 
          public Test() {

         // --- blah blah ....                      
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(425,425) ;
        show() ;
       
    }
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        Test mySnake = new Test() ;
       
    }
   
    public void actionPerformed(ActionEvent e) {
               blah .....    
         if(e.getSource() == restart){ Test PlayAgain = new Test() ;}
               blah .....
   }

      public void gameOver(){
           //   blah ....  
        restart = new JButton() ;
        restart.setText("Play Again!") ;
        restart.setSize(150,30) ;
        restart.setLocation(125,150) ;
        restart.addActionListener(this) ;
        getContentPane().add(restart) ;
          // blah ...
       }
}

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Question by:meow00
  • 2
3 Comments
 
LVL 92

Expert Comment

by:objects
ID: 12223378
you need to keep a reference to the current frame and call its dispose() method to close it.
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LVL 92

Accepted Solution

by:
objects earned 250 total points
ID: 12223410
instead of creating a new window, it may be a better idea to instead clear/reset the current one.
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LVL 3

Assisted Solution

by:CI-Ia0s
CI-Ia0s earned 50 total points
ID: 12223412
If you may need the frame later you can just make it hide with "frameName.setVisible(false);", though this still ties up its resources. If you want to get rid of it for good, use dispose() as objects suggested (note that all of it's component and any variables you might have declared within an extended JPanel, etc. are also erased).
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