jradiobuttondemo.java

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

/**
 * Demonstrates the component {@link JRadioButton}. This class extends
 * class {@link @JPanel}.
 *
 * @author author name
 * @version 1.0.0
 */
public class JRadioButtonDemo extends JPanel {

    private JRadioButton  buttonOne;
    private JRadioButton  buttonTwo;
    private JRadioButton  buttonThree;

    /**
     * Creates a window.
     *
     * @param args  not used.
     */
    public static void main(String[] args) {

        JFrame frame = new JFrame("JRadioButtonDemo");

        frame.setContentPane(new JRadioButtonDemo());
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.pack();    // Adjust the size of the window
        frame.setVisible(true);
    }

    /**
     * Creates three {@link JRadioButton} components.
     */
    public JRadioButtonDemo() {

        setLayout(new GridLayout(1, 3));
        setBackground(Color.white);

        // Create the radio buttons
        buttonOne = new JRadioButton("One", true);
        buttonTwo = new JRadioButton("Two");
        buttonThree = new JRadioButton("Three");

        // Group the radio buttons
        ButtonGroup group = new ButtonGroup();
        group.add(buttonOne);
        group.add(buttonTwo);
        group.add(buttonThree);

        // Change the radio buttons colors
        buttonOne.setBackground(Color.white);
        buttonTwo.setBackground(Color.white);
        buttonThree.setBackground(Color.white);

        // Add radio buttons to the container
        add(buttonOne);
        add(buttonTwo);
        add(buttonThree);
    }
}