Re: closing a specific JF

From:

"Knute Johnson" <knute.johnson@THRWHITE.remove-dii-this>

Newsgroups:

comp.lang.java.gui

Date:

Wed, 27 Apr 2011 15:27:33 GMT

Message-ID:

<X0Jhh.1712$uX4.1314@newsfe09.phx>

To: comp.lang.java.gui
William Z. wrote:

I have a JFrame that, when I click "new" in the menu bar, creates
another JFrame like that of the first. It just runs the following code
...

EventQueue.invokeLater(new Runnable() {
   public void run() {
      MyApp app = new MyApp();
      app.createGUI();
   }
});

And inside the createGUI() method is this ...

addWindowListener(new WindowListener() {
   public void windowOpened(WindowEvent arg0) {}
   public void windowClosed(WindowEvent arg0) {}
   public void windowIconified(WindowEvent arg0) {}
   public void windowDeiconified(WindowEvent arg0) {}
   public void windowActivated(WindowEvent arg0) {}
   public void windowDeactivated(WindowEvent arg0) {}
   public void windowClosing(WindowEvent arg0) {
      System.exit(0);
   }
});

As it works right now, when I close a window, all the windows close and
I'd just like to close only that specific window in which the user
clicked the close button.

Any help much appreciated.

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

public class test extends JFrame implements ActionListener {
     JButton openButton,closeButton;
     JFrame frame;

     public test() {
         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         setLayout(new FlowLayout());

         openButton = new JButton("Open");
         openButton.addActionListener(this);
         add(openButton);

         closeButton = new JButton("Close");
         closeButton.setEnabled(false);
         closeButton.addActionListener(this);
         add(closeButton);

         frame = new JFrame("extra frame");
         frame.addWindowListener(new WindowAdapter() {
             public void windowClosing(WindowEvent we) {
                 test.this.actionPerformed(new ActionEvent(
                  closeButton,ActionEvent.ACTION_PERFORMED,"Close"));
             }
         });
         frame.setSize(400,300);
         frame.setLocationRelativeTo(null);

         pack();
         setVisible(true);
     }

     public void actionPerformed(ActionEvent ae) {
         String ac = ae.getActionCommand();

         if (ac.equals("Open")) {
             openButton.setEnabled(false);
             frame.setVisible(true);
             closeButton.setEnabled(true);
         } else if (ac.equals("Close")) {
             closeButton.setEnabled(false);
             frame.setVisible(false);
             openButton.setEnabled(true);
         }
     }

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

--

Knute Johnson
email s/nospam/knute/

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