Creating Menus in Java

In this section, you will learn about creation of menus, submenus and Separators in Java Swing. Menu bar contains a collection of menus. Each menu can have multiple menu items these are called submenu. Similarly, all menus have multiples menu items. The Separator divides the menu items in a separate groups like same types of menu Items are divided into a individual parts.
The following are the classes which are used while creating menus in java

JMenuBar:
This is the class which constructs a menu bar that contains several menus.
JMenu(String):
This is the constructor of JMenu class. This constructor constructs the new menu. It takes the string type value which is the name label for the menu.
JMenuItem(String):
This is the constructor of JMenuItem class which constructs new menu items for the specific menu. It takes string types value which is the label for the menu item.
JSeparator():
This is the constructor of JSeparator class which adds an extra line between menu items. This line, only separates the menu items.
setJMenuBar():
This method is used to set the menu bar to the specified frame. It takes the object of the JMenuBar class.

Example of a code with menu bar and menus and menu items

import javax.swing.*;

public class SwingMenu{
  public static void main(String[] args) {
  SwingMenu s = new SwingMenu();
  }

  public SwingMenu(){
  JFrame frame = new JFrame("Creating a JMenuBar, JMenu, JMenuItem and
seprator Component");
  frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  JMenuBar menubar = new JMenuBar();
  JMenu filemenu = new JMenu("File");
  filemenu.add(new JSeparator());
  JMenu editmenu = new JMenu("Edit");
  editmenu.add(new JSeparator());
  JMenuItem fileItem1 = new JMenuItem("New");
  JMenuItem fileItem2 = new JMenuItem("Open");
  JMenuItem fileItem3 = new JMenuItem("Close");
  fileItem3.add(new JSeparator());
  JMenuItem fileItem4 = new JMenuItem("Save");
  JMenuItem editItem1 = new JMenuItem("Cut");
  JMenuItem editItem2 = new JMenuItem("Copy");
  editItem2.add(new JSeparator());
  JMenuItem editItem3 = new JMenuItem("Paste");
  JMenuItem editItem4 = new JMenuItem("Insert");
  filemenu.add(fileItem1);
  filemenu.add(fileItem2);
  filemenu.add(fileItem3);
  filemenu.add(fileItem4);
  editmenu.add(editItem1);
  editmenu.add(editItem2);
  editmenu.add(editItem3);
  editmenu.add(editItem4);
  menubar.add(filemenu);
  menubar.add(editmenu);
  frame.setJMenuBar(menubar);
  frame.setSize(400,400);
  frame.setVisible(true);
  }
}
 The output of the above program is as shown below

The image below shows the menu items with a seperator between open and close menu items.