Question

Write an application with three radio buttons labeled “Cyan”, “Magenta”, and “Orange” that changes the background color of a panel in the center of the frame to CYAN, MAGENTA, or ORANGE.

This is required to be programmed in Java.

Answer 1

import javax.swing.*;  //  package
import java.awt.*;  
import java.awt.event.*;
class ColorMain extends Frame implements ActionListener{
        
private JRadioButton Cyan;  
private JRadioButton Magenta; 

        private JRadioButton Orange; // Decalare radio button
          public ColorMain(){
        setLayout(new BorderLayout());
        setVisible(true);
        setSize(400,250);
        JPanel p = new JPanel();
        Cyan=new JRadioButton(" Cyan");
        Orange=new JRadioButton(" Orange");
        Magenta=new JRadioButton(" magenta");
        ButtonGroup bgroup=new ButtonGroup();
        bgroup.add(Cyan);
        bgroup.add(Orange);
        bgroup.add(Magenta);
        Cyan.addActionListener(this);
        Orange.addActionListener(this);
        Magenta.addActionListener(this);
        p.add(Orange);   // place the light component in a saparate container.
        p.add(Cyan);
        p.add(Magenta);
        add(p,BorderLayout.NORTH);      
}
public void actionPerformed(ActionEvent evnt){  //set bg color when button clicked
        if(evnt.getSource()== Cyan){
                setBackground(Color.cyan);
        }
        if(evnt.getSource()== Orange){
                setBackground(Color.orange); 
        }
        
        if(evnt.getSource()== Magenta){
                setBackground(Color.magenta);
        }       
        }
        
}
//driver class
public class Colorbg {
        public static void main(String[] args){
                ColorMain s=new ColorMain();
                s.addWindowListener(new WindowAdapter(){
                        public void windowClosing(WindowEvent e){
                                System.exit(0);
                        }
                        });
        }                       
}