SWING: WindowAdapter Class Cheat Sheet

Following is the declaration for java.awt.event.WindowAdapter class

public abstract class WindowAdapter
   extends Object
      implements WindowListener, WindowStateListener, WindowFocusListener
# Class Constructors

WindowAdapter()

# Methods
void windowActivated(WindowEvent e)Invoked when a Window is activated.
void windowClosed(WindowEvent e)Invoked when a Window has been closed.
void windowClosing(WindowEvent e)Invoked when a Window is in the process of being closed.
void windowDeactivated(WindowEvent e)Invoked when a Window is de-activated.
void windowDeiconified(WindowEvent e)Invoked when a Window is de-iconified.
void windowGainedFocus(WindowEvent e)Invoked when the Window is set to be the focused Window, which means that the Window, or one of its subcomponents, will receive keyboard events.
void windowIconified(WindowEvent e)Invoked when a Window is iconified.
void windowLostFocus(WindowEvent e)Invoked when the Window is no longer the focused Window, which means that keyboard events will no longer be delivered to the Window or any of its subcomponents.
void windowOpened(WindowEvent e)Invoked when a Window has been opened.
void windowStateChanged(WindowEvent e)Invoked when a Window state is changed.
# Methods Inherited
  • java.lang.Object
# WindowAdapter Example

SwingAdapterDemo.java

package com.simplecheatsheet.gui;

import java.awt.*;
import java.awt.event.*;

public class SwingAdapterDemo {
   private JFrame mainFrame;
   private JLabel headerLabel;
   private JLabel statusLabel;
   private JPanel controlPanel;

   public SwingAdapterDemo(){
      prepareGUI();
   }
   public static void main(String[] args){
      SwingAdapterDemo  swingAdapterDemo = new SwingAdapterDemo();        
      swingAdapterDemo.showWindowAdapterDemo();
   }
   private void prepareGUI(){
      mainFrame = new JFrame("Java SWING Examples");
      mainFrame.setSize(400,400);
      mainFrame.setLayout(new GridLayout(3, 1));

      headerLabel = new JLabel("",JLabel.CENTER );
      statusLabel = new JLabel("",JLabel.CENTER);        
      statusLabel.setSize(350,100);
      
      mainFrame.addWindowListener(new WindowAdapter() {
         public void windowClosing(WindowEvent windowEvent){
            System.exit(0);
         }        
      });    
      controlPanel = new JPanel();
      controlPanel.setLayout(new FlowLayout());

      mainFrame.add(headerLabel);
      mainFrame.add(controlPanel);
      mainFrame.add(statusLabel);
      mainFrame.setVisible(true);  
   }
   private void showWindowAdapterDemo(){
      headerLabel.setText("Listener in action: WindowAdapter");      
      JButton okButton = new JButton("OK");
      final JFrame aboutFrame = new JFrame();
      aboutFrame.setSize(300,200);;
      aboutFrame.setTitle("WindowAdapter Demo");
      
      aboutFrame.addWindowListener(new WindowAdapter() {
         public void windowClosing(WindowEvent windowEvent){
            aboutFrame.dispose();
         }        
      });    
      JLabel msglabel 
         = new JLabel("Welcome to TutorialsPoint SWING Tutorial.",JLabel.CENTER);
	   aboutFrame.add(msgLabel);
      aboutFrame.setVisible(true);
   }
}

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