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Create a Popup Menus with Nested Menus in Java
Posted on: April 14, 2007 at 12:00 AM

In this section, you will learn how to create a nested popup menu in Java Swing.

Create a Popup Menus with Nested Menus in Java

In this section, you will learn how to create a nested popup menu in Java Swing. When you click the right mouse button on the frame then you get a popup menu. Here, you will show multiple menu items like: line up icon, refresh, properties and new in the list of the menu which represents the popup menu. The new menu item have another popup menu which contains items like: folder, text document and shortcut. Following figure shows the nested popup menu:

Nested Pop Up Menu in Swing Application

createMenu(String):
This method has been used to create a nested list of menus for the 'New' menu item from the main popup menu list.

Here is the code of program:


import javax.swing.*;

import java.awt.event.*;



public class NestedPopupMenu{

  JPopupMenu Pmenu;

  JMenuItem Mitem;

  public static void main(String[] args) {

  NestedPopupMenu n = new NestedPopupMenu();

  }



  public  NestedPopupMenu(){

  JFrame frame = new JFrame("Creating a Popup Menu with Nested Menus");

  frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

  Pmenu = new JPopupMenu();

  Mitem = new JMenuItem("Line Up Icon");

  Pmenu.add(Mitem);

  Mitem = new JMenuItem("Refresh");

  Pmenu.add(Mitem);

  Mitem = new JMenuItem("Properties");

  Pmenu.add(Mitem);

  Pmenu.add(createMenu("New"));

  frame.addMouseListener(new MouseAdapter(){

  public void mouseReleased(MouseEvent Me){

  if(Me.isPopupTrigger()){

  Pmenu.show(Me.getComponent(), Me.getX(), Me.getY());

  }

  }

  });

  frame.setSize(400,400);

  frame.setVisible(true);

  }



  public JMenu createMenu(String title){

  JMenu m = new JMenu(title);

  m.add("Folder");

  m.add("Text Document");

  m.add("Shortcut");

  return m;

  }

}

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