[Java Swing] - How to create a Menu Bar in Java UI.

Note: Some resources I get from Oracle: https://docs.oracle.com/javase/tutorial/uiswing/components/menu.html

Before create a menu in Java UI, we need to know the menu component hierarchy as below:


We must be created three objects: JMenuBar, JMenuItem, JMenu.
This section I use WindowBuilder tool on Eclipse Market.My purpose is convenience on control UI but I think you should handle fundamental about Java UI before use tool.

I. Install WindowBuilder

1. Go to menu bar > Help > Eclipse Market
2. Search "WindowBuilder" keyword
3. Choose WindowBuilder x.x.x and install it.
4. Project > New > WindowBuilder > Swing Designer > Application Window

II. Examples About Menu on Java UI.

 1. Create simple menu

MenuOneDemo.java

package com.parentralcontrol.ui;

import java.awt.EventQueue;

import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JPanel;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;

/**
 * DESCRIPTION GOES HERE<br>
 * @author Tri Ho
 * @created Oct 28, 2017
 * @version $Revision$
 */
public class MenuOneDemo {

    private JFrame frmSimpleMenu;

    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    MenuOneDemo window = new MenuOneDemo();
                    window.frmSimpleMenu.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the application.
     */
    public MenuOneDemo() {
        initialize();
    }

    /**
     * Initialize the contents of the frame.
     */
    private void initialize() {
        frmSimpleMenu = new JFrame();
        frmSimpleMenu.setTitle("Simple Menu 1");
        frmSimpleMenu.setBounds(100, 100, 450, 300);
        frmSimpleMenu.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frmSimpleMenu.getContentPane().setLayout(null);
       
        JPanel panel = new JPanel();
        panel.setBounds(0, 0, 434, 55);
        frmSimpleMenu.getContentPane().add(panel);
        panel.setLayout(null);
        
        //create a menu bar
        JMenuBar menuBar = new JMenuBar();
        menuBar.setBounds(0, 0, 97, 21);
        panel.add(menuBar);
        
        //create  main menu
        JMenu menu1 = new JMenu("Menu1");
        JMenu menu2 = new JMenu("Menu3");

        
        //add menu to menu bar
        menuBar.add(menu1);
        menuBar.add(menu2);
        
        // create menu item
        JMenuItem menuItem1 = new JMenuItem("Menu Item 1");
        JMenuItem menuItem2 = new JMenuItem("Menu Item 2");
        JMenuItem menuItem3 = new JMenuItem("Menu Item 3");
        JMenuItem menuItem4 = new JMenuItem("Menu Item 4");
       
        menu1.add(menuItem1);
        menu1.add(menuItem2);
        menu1.add(menuItem3);
        menu2.add(menuItem4);
    }
}
Results: