Stuff

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();	}}