extends WindowAdapter : WindowAdapter « java.awt.event « Java by API

1. Java by API
2. java.awt.event
3. WindowAdapter

extends WindowAdapter

import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class MainClass extends JPanel {

  public MainClass() {

    JButton btn1 = new JButton("Button1");
    add(btn1);

  }

  public static void main(String[] args) {
    JFrame frame = new JFrame();
    frame.getContentPane().add(new MainClass());

    //frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.addWindowListener(new FrameListener());
    
    frame.setSize(200, 200);
    frame.setVisible(true);
  }
}
class FrameListener extends WindowAdapter
{
   public void windowClosing(WindowEvent e)
  {
    System.exit(0);
  }
}

           
       

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