BCA Slip14 Java

Java

Slip14

Q.1) Write a Java program which will create a frame if we try to close it, it should change it’s color and it remains visible on the screen(Use swing). [Marks 30] 

Solution

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

class Ccolor extends JFrame
{
    JPanel p = new JPanel();
    Ccolor()
    {
      setVisible(true);
      setSize(400,400);
      setLocation(200,300);
      setTitle("Swing Background");
      add(p);
      p.setBackground(Color.green);
      addWindowListener(new WindowAdapter()
      {
    public void windowClosing(WindowEvent e)
    {
      
          if(p.getBackground() == Color.green)
             p.setBackground(Color.blue);
          else
             p.setBackground(Color.green);

    setDefaultCloseOperation(1);
        }});
        
   }

   public static void  main(String args[])
   {
      new Ccolor();
   }
}