I am trying to create a Java GUI where if i click Red, the background will become Red. But it is not working. Please help me fix my code.

Heres my code

import java.awt.EventQueue;

import java.awt.Menu;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JFrame;

import javax.swing.JMenuBar;

import javax.swing.JMenuItem;

import javax.swing.JPanel;

import javax.swing.JMenu;

import java.awt.BorderLayout;

import java.awt.Color;

public class ThreeColor {

private JFrame frame;

/**

* Launch the application.

*/

public static void main(String[] args) {

EventQueue.invokeLater(new Runnable() {

public void run() {

try {

ThreeColor window = new ThreeColor();

window.frame.setVisible(true);

} catch (Exception e) {

e.printStackTrace();

}

}

});

}

/**

* Create the application.

*/

public ThreeColor() {

initialize();

}

/**

* Initialize the contents of the frame.

*/

private void initialize() {

frame = new JFrame();

frame.setBounds(100, 100, 450, 300);

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

JMenuBar menuBar = new JMenuBar();

menuBar.setToolTipText("Color");

frame.setJMenuBar(menuBar);

JMenu mnColor = new JMenu("Color");

menuBar.add(mnColor);

JMenuItem mntmGreen = new JMenuItem("Green");

mntmGreen.setBackground(Color.GREEN);

mnColor.add(mntmGreen);

{

mntmGreen.addActionListener (new ActionListener()

{

public void actionPerformed (ActionEvent e)

{

JPanel p = new JPanel(new BorderLayout(3,3));

p.setSize(200,100);

p.setLocation(50,50);

p.setBackground(Color.green);

}

});

}

JMenuItem mntmBlue = new JMenuItem("Blue");

mntmBlue.setBackground(Color.BLUE);

mnColor.add(mntmBlue);

{

mntmBlue.addActionListener (new ActionListener()

{

public void actionPerformed (ActionEvent e)

{

JPanel p = new JPanel(new BorderLayout(3,3));

p.setSize(200,100);

p.setLocation(50,50);

p.setBackground(Color.blue);

}

});

}

JMenuItem mntmRed = new JMenuItem("Red");

mntmRed.setBackground(Color.RED);

mnColor.add(mntmRed);

{

mntmRed.addActionListener (new ActionListener()

{

public void actionPerformed (ActionEvent e)

{

JPanel p = new JPanel(new BorderLayout(3,3));

p.setSize(200,100);

p.setLocation(50,50);

p.setBackground(Color.red);

}

});

}

mnColor.add(mntmRed);

mnColor.add(mntmGreen);

mnColor.add(mntmBlue);

}

}