Keyboard Mnemonics and Accelerators

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

class MnemonicAcceleratorExample extends JFrame {
    public MnemonicAcceleratorExample() {
        setTitle("Mnemonic and Accelerator Example");
        setSize(300, 200);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JMenuBar menuBar = new JMenuBar();
        setJMenuBar(menuBar);

        JMenu fileMenu = new JMenu("File");

        fileMenu.setMnemonic(KeyEvent.VK_F);
        menuBar.add(fileMenu);

        JMenuItem openMenuItem = new JMenuItem("Open");
        openMenuItem.setMnemonic(KeyEvent.VK_O);
        openMenuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O, ActionEvent.CTRL_MASK));
        fileMenu.add(openMenuItem);

        JMenuItem saveMenuItem = new JMenuItem("Save");
        saveMenuItem.setMnemonic(KeyEvent.VK_S);
        saveMenuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S, ActionEvent.CTRL_MASK));
        fileMenu.add(saveMenuItem);

        openMenuItem.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                System.out.println("Open file selected");
            }
        });

        saveMenuItem.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                System.out.println("Save file selected");
            }
        });
    }


}

public class GUI{
    public static void main(String[] args) {
        MnemonicAcceleratorExample example = new MnemonicAcceleratorExample();
        example.setVisible(true);
    }
}