jbutton Click Event example Advance Java

Jbutton Click Event example Advance Java 

Change frame Color On Button click Advance Java 

import javax.swing.*;

import java.awt.*;

import java.awt.event.*;

    

class FrameDemo extends JFrame implements ActionListener

{

     

JButton btn;

Container c;

        

FrameDemo()

{              

c=this.getContentPane();

       JButton btn= new JButton("Click");

btn.setBounds(100,50,100,50);

        c.add(btn);

        c.setLayout(null);

       btn.addActionListener(this);

}

                  

public void actionPerformed(ActionEvent a)

{ 

                  

c.setBackground(Color.RED);

}

}

       // creating a class ActionDemo (step 2 )

class ActionDemo

{

public static void main( String args[])

{

                // Creating object of FrameDemo class ( Step 5 )

FrameDemo f=new FrameDemo();

f.setTitle("click Event ");

f.setVisible(true);

f.setBounds(100,50,700,500);

f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

}