//VisibilityDemoSTQ52.java

import javax.swing.ImageIcon;
import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JLabel;
import java.awt.Color;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

/**
 * Solution to Self-Test Question 52.
 */
public class VisibilityDemoSTQ52 extends JApplet implements ActionListener
{
    private JButton aButton;
    private JLabel response;
    private Container contentPane;

    public void init()
    {
        contentPane = getContentPane();
        contentPane.setBackground(Color.WHITE);

        //Create button:
        aButton = new JButton("Push me!");
        aButton.addActionListener(this);

        //Create label:
        response = new JLabel("Thanks. That felt good!");
        ImageIcon smileyFaceIcon = new ImageIcon("smiley.gif");
        response.setIcon(smileyFaceIcon);
        response.setVisible(false); //Invisible until button is clicked

        //Add button:
        contentPane.setLayout(new FlowLayout());
        contentPane.add(aButton);

        //Add label
        contentPane.add(response);
    }

    public void actionPerformed
    (
        ActionEvent e
    )
    {
        contentPane.setBackground(Color.PINK);
        response.setVisible(true);//Show label
        aButton.setVisible(false);//Hide button
    }
}