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Create a Popup Menus with Nested Menus in Java

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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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Posted on: April 14, 2007

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