Problem

Pick one or more Swing GUI components (JLabel, JTextField, JCheckBox, JComboBox, JList, JPanel) and treat them the same way Dr. Smith treated the JButton class.

Please take screenshot once compiled.

//---------------------------------------------------------

// Dr. Smith

// Problem3.java

//---------------------------------------------------------

import javax.swing.*;

public class Problem3

{

public static void main(String[] args)

{

GUI gui = new GUI();

gui.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

gui.setSize(800,600);

gui.setVisible(true);

}

}

//---------------------------------------------------------

// Dr. Smith

// GUI.java

//---------------------------------------------------------

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

//---------------------------------------------------------

public class GUI extends JFrame

//---------------------------------------------------------

{

private JButton R1C1;

private JButton R1C2;

private JButton R2C1;

private JButton R2C2;

private Font font = new Font("Courier",Font.PLAIN+Font.BOLD,20);

//----------------------------------------------------

public GUI()

//----------------------------------------------------

{

super("Chapter #14, Problem #3");

setLayout( new GridLayout(2,2,5,5) );

Icon myIcon1 = new ImageIcon(getClass().getResource("MyIcon1.png"));

R1C1 = new JButton("(1,1)");

R1C1.setFont(font);

R1C1.setForeground(Color.WHITE);

R1C1.setBackground(Color.BLUE);

R1C1.setRolloverIcon(myIcon1);

add(R1C1);

R1C2 = new JButton("(1,2)");

R1C2.setFont(font);

R1C2.setForeground(Color.WHITE);

R1C2.setBackground(Color.CYAN);

add(R1C2);

R2C1 = new JButton("(2,1)");

R2C1.setFont(font);

R2C1.setForeground(Color.WHITE);

R2C1.setBackground(Color.GREEN);

add(R2C1);

R2C2 = new JButton("(2,2)");

R2C2.setFont(font);

R2C2.setForeground(Color.WHITE);

R2C2.setBackground(Color.MAGENTA);

add(R2C2);

ButtonHandler handler = new ButtonHandler();

R1C1.addActionListener(handler);

R1C2.addActionListener(handler);

R2C1.addActionListener(handler);

R2C2.addActionListener(handler);

}

//----------------------------------------------------

private class ButtonHandler implements ActionListener

//----------------------------------------------------

{

//----------------------------------------------------

@Override

public void actionPerformed(ActionEvent event)

//----------------------------------------------------

{

Icon myIcon2 = new ImageIcon(getClass().getResource("MyIcon2.png"));

if ( event.getSource() == R1C1 )

{

if ( R1C1.getIcon() == null )

R1C1.setIcon(myIcon2);

else

R1C1.setIcon(null);

}

else if ( event.getSource() == R1C2 )

{

if ( R1C2.getIcon() == null )

R1C2.setIcon(myIcon2);

else

R1C2.setIcon(null);

}

else if ( event.getSource() == R2C1 )

{

if ( R2C1.getIcon() == null )

R2C1.setIcon(myIcon2);

else

R2C1.setIcon(null);

}

else if ( event.getSource() == R2C2 )

{

if ( R2C2.getIcon() == null )

R2C2.setIcon(myIcon2);

else

R2C2.setIcon(null);

}

}

}

}

MyIcon.png

MyIcon1.png

MyIcon2.png