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

import java.awt.event.*;

public class radio
{
	private JRadioButton btn1 = new JRadioButton("Cube");
	private JRadioButton btn2 = new JRadioButton("Pyramid");
	private JRadioButton btn3 = new JRadioButton("Sphere");
	
	public radio()
	{
		JFrame frame = new JFrame("java radio button example");
		
		frame.setSize(320, 240);
		
		Container content = frame.getContentPane();
		
		ButtonGroup buttons = new ButtonGroup();
		
		buttons.add(btn1);
		buttons.add(btn2);
		buttons.add(btn3);
		
		JPanel buttonPanel = new JPanel();
		
		buttonPanel.add(btn1);
		buttonPanel.add(btn2);
		buttonPanel.add(btn3);
		
		btn1.addActionListener(new ActionListener()
			{
				public void actionPerformed(ActionEvent ae)
				{
					btn2.setEnabled(false);
					btn3.setEnabled(false);
				}
			});
		
		content.add(buttonPanel, BorderLayout.SOUTH);
		
		frame.setVisible(true);
	}
	
	public static void main(String[] args)
	{
		new radio();
	}
}