BCA JAVA 2015 SLIP 14

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

class Slip14 extends JFrame

{

      JPanel p = new JPanel();

      Slip14()

      {     setVisible(true);

            setSize(400,400);

            setTitle("Swing Background");

             add(p);

           

            addWindowListener(new WindowAdapter()

            {

            public void windowClosing(WindowEvent e)

            {     p.setBackground(Color.RED);

                              JOptionPane.showMessageDialog(null,"Close window","Login",JOptionPane.INFORMATION_MESSAGE);

               

                  }

            });

      }

     

      public static void  main(String args[])

      {

            new Slip14();

      }

}