Question

Write an application with three buttons labeled “Red”, “Green”, and “Blue” that changes the background color of a panel in the center of the frame to red, green, or blue.

Add icons to the buttons of Exercise E19.1. Use a JButton constructor with an Icon argument and supply an ImageIcon.

this is the code that I already wrote that I need to do the above to.

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.ImageIcon;

public class backgroundColor extends JFrame
{

   private static final int FRAME_WIDTH = 500;
   private static final int FRAME_HEIGHT = 500;
   private JPanel colorPanel;
  
   public backgroundColor()
   {
       setTitle("Colored Buttons");
       createColorBackground();
       setSize(FRAME_WIDTH, FRAME_HEIGHT);
       setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
       setVisible(true);
   }
  
   private void createColorBackground()
   {
       colorPanel = new JPanel();
       add(colorPanel, BorderLayout.CENTER);
       buttonColors();
   }
  
   private void buttonColors()
   {
       JPanel buttonsPanel = createButtons();
       add(buttonsPanel, BorderLayout.SOUTH);
   }
  
   private JPanel createButtons()
   {
       JPanel buttonsPanel = new JPanel(new GridLayout(3, 1));
       buttonsPanel.add(createButton("Red", Color.RED));
       buttonsPanel.add(createButton("Green", Color.GREEN));
       buttonsPanel.add(createButton("Blue", Color.BLUE));
       return buttonsPanel;
   }
  
   private JButton createButton(String label, final Color color)
   {
       JButton button = new JButton(label);
       ActionListener listener = new backgroundColorListener();
       button.addActionListener(listener);
       return button;
   }
  
   class backgroundColorListener
   implements ActionListener
   {
       public void actionPerformed(ActionEvent action)
       {
           if(action.getActionCommand().contentEquals("Red"))
               colorPanel.setBackground(Color.red);
           else
               if(action.getActionCommand().contentEquals("Green"))
                   colorPanel.setBackground(Color.green);
               else
                   if(action.getActionCommand().contentEquals("Blue"))
                       colorPanel.setBackground(Color.blue);
       }
   }
   public static void main(String[] args)
   {
       new backgroundColor();
   }
}

Answer 1

PROGRAM :

import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.BorderFactory;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.BevelBorder;

public class WindowApplication extends JFrame implements ActionListener{
  
JPanel colorPanel;
JPanel checkBoxPanel;
  
JCheckBox red;
JCheckBox green;
JCheckBox blue;
  
public WindowApplication() {
super("Window Application");
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
this.setSize(400, 378);
getContentPane().setLayout(null);
  
colorPanel = new JPanel();
colorPanel.setBounds(45, 21, 309, 186);
colorPanel.setBorder(BorderFactory.createBevelBorder(BevelBorder.LOWERED));
getContentPane().add(colorPanel);
  
checkBoxPanel = new JPanel();
checkBoxPanel.setBounds(10, 262, 364, 54);
getContentPane().add(checkBoxPanel);
  
red = new JCheckBox("Red");
green = new JCheckBox("Green");
blue = new JCheckBox("Blue");
  
checkBoxPanel.add(red);
checkBoxPanel.add(green);
checkBoxPanel.add(blue);
  
red.addActionListener(this);
green.addActionListener(this);
blue.addActionListener(this);
  
this.setVisible(true);
  
}

@Override
public void actionPerformed(ActionEvent e) {
  
if(e.getSource().equals(red) || e.getSource().equals(green) || e.getSource().equals(blue)){
  
int redComponent = 0;
int greenComponent = 0;
int blueComponent = 0;
if(red.isSelected())
redComponent = 255;
if(green.isSelected())
greenComponent = 255;
if(blue.isSelected())
blueComponent = 255;
  
colorPanel.setBackground(new Color(redComponent, greenComponent, blueComponent));
this.repaint();
  
}
  
}
  
public static void main(String[] args) {

new WindowApplication();
  
}

}

OUTPUT ;