ChildWindow.java

package view;

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

public class ChildWindow {

	private JFrame mainFrame;
	private JLabel headerLabel;
	private JLabel statusLabel;
	private JPanel controlPanel;

	public ChildWindow(){
		prepareGUI();
	}
	public static void main(String[] args){
		ChildWindow  ChildWindow = new ChildWindow();      
		ChildWindow.showButtonDemo();
	}
	private void prepareGUI(){
		mainFrame = new JFrame("Child");
		mainFrame.getContentPane().setBackground(new Color(149, 32, 216));
		mainFrame.setSize(400,250);
		//need to set this to null and position everything manually
		mainFrame.setLayout(new GridLayout(3, 1));

		mainFrame.addWindowListener(new WindowAdapter() {
			public void windowClosing(WindowEvent windowEvent){
				System.exit(0);
			}        
		});    
		headerLabel = new JLabel("", JLabel.CENTER);   
		headerLabel.setFont(headerLabel.getFont().deriveFont(Font.BOLD, 16f));
		statusLabel = new JLabel("",JLabel.CENTER);    
		statusLabel.setSize(350,100);

		controlPanel = new JPanel();
		controlPanel.setLayout(new FlowLayout());
		controlPanel.setBackground(new Color(149, 32, 216));

		mainFrame.add(headerLabel);
		mainFrame.add(controlPanel);
		mainFrame.add(statusLabel);
		mainFrame.setVisible(true);  
	}

	private void showButtonDemo(){
		headerLabel.setText("Child"); 
		statusLabel.setText("You have a child!");

		//resources folder should be inside SWING folder.

		JButton Child = new JButton("Exit");        

		Child.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {     	     	
				try {
					Thread.sleep(1000);
				} catch (InterruptedException e1) {
					// TODO Auto-generated catch block
					e1.printStackTrace();
				}

				statusLabel.setText("");

				System.exit(0);
			}          
		});

		controlPanel.add(Child);     
		mainFrame.setVisible(true);  
	}
}