How to add event handler in maximize window

Question

I need to add code to maximize event... please help

Answer 1

The listener interface you want is WindowStateListener.
This is Implemented in WindowAdapter so is used in the following example.import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class WindowStateTest extends JFrame
     JLabel label;
     public WindowStateTest()
          super("WindowStateTest");
          setSize(400,400);
          setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
          addWindowStateListener(new WindowAdapter()
                    public void windowStateChanged(WindowEvent e)
                         if(e.getNewState() == Frame.NORMAL)
                              ((WindowStateTest)e.getSource())
                                   .label.setText("Window is Normal");
                         else if(e.getNewState() == Frame.MAXIMIZED_BOTH)
                              ((WindowStateTest)e.getSource())
                                   .label.setText("Window is Maximized");
                    public void windowClosing(WindowEvent e)
                         {System.exit(0);}
          label = new JLabel("Window is Normal");
          JPanel p = new JPanel(new FlowLayout());
          p.add(label);
          getContentPane().add(p, BorderLayout.CENTER);
     public static void main(String[] args)
          new WindowStateTest().setVisible(true);
}