How can we set Mnemonic Key Radio Button in Java?

Mnemonic key is set so that a user can use Keyboard keys to select a Radio Button. For example, a key can be set with ALT −

radio2.setMnemonic(KeyEvent.VK_R);

Above, we have set key ALT+R for radio2.

The following is an example to set Mnemonic key radio button −

package my; import java.awt.FlowLayout; import java.awt.event.KeyEvent; import javax.swing.ButtonGroup; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JRadioButton; public class SwingDemo {    public static void main(String[] args) {       JRadioButton radio1 = new JRadioButton("Male");       JRadioButton radio2 = new JRadioButton("Female");       radio2.setMnemonic(KeyEvent.VK_R);       ButtonGroup group = new ButtonGroup();       group.add(radio1);       group.add(radio2);       radio1.setSelected(true);       JFrame frame = new JFrame();       frame.setLayout(new FlowLayout());       frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);       frame.add(new JLabel("Select Gender:"));       frame.add(radio1);       frame.add(radio2);       frame.pack();       frame.setVisible(true);    } }

The output is as follows. When you will press Alt+R, you will be able to select the radio buttons.

Output