Java Program for Swing Menu, MenuItem, MenuBar

A top-level window can have a menubar associated with it. A menubar displays a list of top-level menu choices. Each choice is associated with a drop-down menu.

This concept is implemented in Java by following classes : 

JMenuBar, JMenu, JMenuItem

Swing Components Used:

JMenuBar:

A JMenuBar contains 1 or more menu objects.

JMenu:

Each Menu object contains a list of JMenuItem objects.

JMenuItem:

Each JMenuItem object  represents something that can be selected by user.

It is also possible to create checkable JMenuItem using type CheckboxMenuItem.

Program:

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class menu1 extends JFrame implements ActionListener {
    static JMenuBar mb;
    static JMenu x, x1;
    static JMenuItem m1, m2, m3, s1, s2;
    static JFrame f;
    static JLabel l;
 
    public static void main(String args[])
    {
        menu1 m = new menu1();
 
        f = new JFrame("Menu demo using Swing");
 
        l = new JLabel("No task has been performed ");
 
        mb = new JMenuBar();
        x = new JMenu("Menu");
        x1 = new JMenu("submenu");
        m1 = new JMenuItem("New");
        m2 = new JMenuItem("Open");
        m3 = new JMenuItem("Exit");
        s1 = new JMenuItem("Save");
        s2 = new JMenuItem("Save as");
 
        // add ActionListener to menuItems
        m1.addActionListener(m);
        m2.addActionListener(m);
        m3.addActionListener(m);
        s1.addActionListener(m);
        s2.addActionListener(m);
        x.add(m1);
        x.add(m2);
        x.add(m3);
        x1.add(s1);
        x1.add(s2);
        x.add(x1);
        mb.add(x);
        f.setJMenuBar(mb);
        f.add(l);
        f.setSize(500, 500);
        f.setVisible(true);
    }
    public void actionPerformed(ActionEvent e)
    {
        String s = e.getActionCommand();
        l.setText(s + " selected");
    }
}

Output: 

Before selecting “Save as” :

After selecting “Save as” :