Java tutorial
import java.awt.event.KeyEvent; import javax.swing.ButtonGroup; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JRadioButton; public class MainClass extends JFrame { MainClass(String title) { super(title); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JRadioButton rb1 = new JRadioButton("Male"); rb1.setMnemonic(KeyEvent.VK_M); rb1.setActionCommand("Male"); rb1.setSelected(true); JRadioButton rb2 = new JRadioButton("Female"); rb2.setMnemonic(KeyEvent.VK_F); rb2.setActionCommand("Female"); rb2.setSelected(true); ButtonGroup bg = new ButtonGroup(); bg.add(rb1); bg.add(rb2); JPanel jp = new JPanel(); jp.add(rb1); jp.add(rb2); getContentPane().add(jp); pack(); setVisible(true); } public static void main(String[] args) { new MainClass("RadioButton Demo"); } }