New to Java

I need to find a way to get the following code to function the same way when the class extends JPanel instead of JFrame.

This is a demo i put together but i have some more code which i am trying to get the same functionality out of. However that code extends JPanel instead of JFrame and i dont think changing it is the best approach.

The other code gives me the following error when i click the JLabel, and i have narrowed it down to being caused by the line that adds the mouselistener to the JLabel if that helps.

I dont really understand fully what extending does.

import java.io.*;
import java.awt.*;
import java.util.*;
import javax.swing.*;
import java.awt.event.*;
import java.lang.Object.*;

public class LabelEvent extends JFrame implements MouseListener, ActionListener
{
	private JLabel label = new JLabel("   [ON]    ");
	private JButton button = new JButton("Open");
	
	private JFrame testFrame = new JFrame("Test Frame");
	private JPanel testFramePane = new JPanel();
	
	LabelEvent()
	{
	    button.addActionListener(this);
	    add(button);
	}
	
	public void actionPerformed(ActionEvent ae)
	{
		if(ae.getSource() == button)
		{
			newFrame();
		}
	}
	public void mouseClicked(MouseEvent me) {}
	public void mouseEntered(MouseEvent me) {}
	public void mouseExited(MouseEvent me) {}
	public void mousePressed(MouseEvent me)
	{
		if(me.getSource() == label)
		{			
			Color curr = label.getForeground();
			if(curr == Color.red)
			{
				label.setForeground(Color.gray);
			}
			else
			{
				label.setForeground(Color.red);
			}			
		}
	}
	public void mouseReleased(MouseEvent me) {}
	
	private void newFrame()
	{
		label.addMouseListener(this);
		label.setForeground(Color.gray);
		testFramePane.add(label);
		
		testFrame.setSize(100,100);
		testFrame.getContentPane().add(testFramePane);
		testFrame.setVisible(true);
	}
	
	public static void main(String[] args) 
    {
		LabelEvent le = new LabelEvent();
		le.setBounds(0, 0, 200, 100);
		le.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		le.setVisible(true);
	}
}

error from other code when i click the JLabel:

Exception in thread "AWT-EventQueue-0" java.lang.NumberFormatException: For input string: "  [ON]  "

        at java.lang.NumberFormatException.forInputString(Unknown Source)
        at java.lang.Integer.parseInt(Unknown Source)
        at java.lang.Integer.valueOf(Unknown Source)
        at HomeController.mousePressed(HomeController.java:333)
        at java.awt.Component.processMouseEvent(Unknown Source)
        at javax.swing.JComponent.processMouseEvent(Unknown Source)
        at java.awt.Component.processEvent(Unknown Source)
        at java.awt.Container.processEvent(Unknown Source)
        at java.awt.Component.dispatchEventImpl(Unknown Source)
        at java.awt.Container.dispatchEventImpl(Unknown Source)
        at java.awt.Component.dispatchEvent(Unknown Source)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
        at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
        at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
        at java.awt.Container.dispatchEventImpl(Unknown Source)
        at java.awt.Window.dispatchEventImpl(Unknown Source)
        at java.awt.Component.dispatchEvent(Unknown Source)
        at java.awt.EventQueue.dispatchEvent(Unknown Source)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.run(Unknown Source)