JPOPUPMENU

Popup menu represents a menu which can be dynamically popped up at a specified position within a component.

Class Declaration

Following is the declaration for javax.swing.JPopupMenu class −

public class JPopupMenu
   extends JComponent
      implements Accessible, MenuElement

Class Constructors

Sr.No.	Constructor & Description
1	JPopupMenu() Constructs a JPopupMenu without an "invoker".
2	JPopupMenu(String label) Constructs a JPopupMenu with the specified title.

Class Methods

Here is the list of methods in Swing JPopupMenu Control class.

Methods Inherited

This class inherits methods from the following classes −

• javax.swing.JComponent
• java.awt.Container
• java.awt.Component
• java.lang.Object

JPOPUPMENU EXAMPLE

import javax.swing.*;
import java.awt.event.*;
class PopupMenuExample
{
     PopupMenuExample(){
         final JFrame f= new JFrame("PopupMenu Example");
         final JPopupMenu popupmenu = new JPopupMenu("Edit");
         JMenuItem cut = new JMenuItem("Cut");
         JMenuItem copy = new JMenuItem("Copy");
         JMenuItem paste = new JMenuItem("Paste");
         popupmenu.add(cut); popupmenu.add(copy); popupmenu.add(paste);
         f.addMouseListener(new MouseAdapter() {
            public void mouseClicked(MouseEvent e) {
                popupmenu.show(f , e.getX(), e.getY());
            }
         });
         f.add(popupmenu);
         f.setSize(300,300);
         f.setLayout(null);
         f.setVisible(true);
     }
    public static void main(String args[])
    {
        new PopupMenuExample();
    }
}  

OUTPUT

ANOTHER JPOPUPMENU EXAMPLE

import java.awt.Container;
import javax.swing.*;
import java.awt.event.*;
public class PopupMenuExample extends JFrame
{
  JPopupMenu popup;
 
  public PopupMenuExample()
  {
    Container c = getContentPane( ) ;
 
    popup = new JPopupMenu();
                                         // add menu items to popup
    popup.add(new JMenuItem("undo"));
    popup.add(new JMenuItem("redo"));
    popup.addSeparator();
    popup.add(new JMenuItem("cut"));
    popup.add(new JMenuItem("copy"));
    popup.add(new JMenuItem("paste"));
 
    c.addMouseListener(new MouseAdapter()   
    {     
      public void mouseReleased(MouseEvent e)  
      {
        showPopup(e);                    // showPopup() is our own user-defined method
      } } ) ;
 
    setTitle("PopupMenu by sjavaspot");
    setSize(500, 300);
    setVisible(true);
  }
  void showPopup( MouseEvent e )  
  {
    if(e.isPopupTrigger())
      popup.show(e.getComponent(), e.getX( ), e.getY());
  }
  public static void main(String args[])
  {
    new PopupMenuExample();
  }
}

OUTPUT:

ANOTHER JPOPUPMENU CODE AND OUTPUT

import java.awt.*;
import java.awt.event.*;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JPopupMenu;

public class SwingJpopupMenu{
   private JFrame mainFrame;
   private JLabel headerLabel;
   private JLabel statusLabel;
   private JPanel controlPanel; 

   public SwingJpopupMenu(){
      prepareGUI();
   }
   public static void main(String[] args){
      SwingJpopupMenu  swingMenuDemo = new SwingJpopupMenu();     
      swingMenuDemo.showPopupMenuDemo();
   }
   private void prepareGUI(){
      mainFrame = new JFrame("Java SWING Examples");
      mainFrame.setSize(400,400);
      mainFrame.setLayout(new GridLayout(3, 1));

      headerLabel = new JLabel("",JLabel.CENTER );
      statusLabel = new JLabel("",JLabel.CENTER);        
      statusLabel.setSize(350,100);
      
      mainFrame.addWindowListener(new WindowAdapter() {
         public void windowClosing(WindowEvent windowEvent){
            System.exit(0);
         }        
      });
      controlPanel = new JPanel();
      controlPanel.setLayout(new FlowLayout());

      mainFrame.add(headerLabel);
      mainFrame.add(controlPanel);
      mainFrame.add(statusLabel);
      mainFrame.setVisible(true);  
   }
   private void showPopupMenuDemo(){
      final JPopupMenu editMenu = new JPopupMenu("Edit"); 

      JMenuItem cutMenuItem = new JMenuItem("Cut");
      cutMenuItem.setActionCommand("Cut");

      JMenuItem copyMenuItem = new JMenuItem("Copy");
      copyMenuItem.setActionCommand("Copy");

      JMenuItem pasteMenuItem = new JMenuItem("Paste");
      pasteMenuItem.setActionCommand("Paste");

      MenuItemListener menuItemListener = new MenuItemListener();

      cutMenuItem.addActionListener(menuItemListener);
      copyMenuItem.addActionListener(menuItemListener);
      pasteMenuItem.addActionListener(menuItemListener);

      editMenu.add(cutMenuItem);
      editMenu.add(copyMenuItem);
      editMenu.add(pasteMenuItem);   

      mainFrame.addMouseListener(new MouseAdapter() {
         public void mouseClicked(MouseEvent e) {            
            editMenu.show(mainFrame, e.getX(), e.getY());
         }               
      });
      mainFrame.add(editMenu); 
      mainFrame.setVisible(true);
   }
   class MenuItemListener implements ActionListener {
      public void actionPerformed(ActionEvent e) {            
         statusLabel.setText(e.getActionCommand() + " MenuItem clicked.");
      }    
   }   
}

THE OUTPUT

ANOTHER JPOPUPMENU EXAMPLE

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JPopupMenu;
import javax.swing.border.BevelBorder;
import javax.swing.event.PopupMenuEvent;
import javax.swing.event.PopupMenuListener;

public class PopupMenuExample extends JPanel {

  public JPopupMenu popup;

  public PopupMenuExample() {
    popup = new JPopupMenu();
    ActionListener menuListener = new ActionListener() {
      public void actionPerformed(ActionEvent event) {
        System.out.println("Popup menu item ["
            + event.getActionCommand() + "] was pressed.");
      }
    };
    JMenuItem item;
    popup.add(item = new JMenuItem("Left", new ImageIcon("1.gif")));
    item.setHorizontalTextPosition(JMenuItem.RIGHT);
    item.addActionListener(menuListener);
    popup.add(item = new JMenuItem("Center", new ImageIcon("2.gif")));
    item.setHorizontalTextPosition(JMenuItem.RIGHT);
    item.addActionListener(menuListener);
    popup.add(item = new JMenuItem("Right", new ImageIcon("3.gif")));
    item.setHorizontalTextPosition(JMenuItem.RIGHT);
    item.addActionListener(menuListener);
    popup.add(item = new JMenuItem("Full", new ImageIcon("4.gif")));
    item.setHorizontalTextPosition(JMenuItem.RIGHT);
    item.addActionListener(menuListener);
    popup.addSeparator();
    popup.add(item = new JMenuItem("Settings . . ."));
    item.addActionListener(menuListener);

    popup.setLabel("Justification");
    popup.setBorder(new BevelBorder(BevelBorder.RAISED));
    popup.addPopupMenuListener(new PopupPrintListener());

    addMouseListener(new MousePopupListener());
  }

  // An inner class to check whether mouse events are the popup trigger
  class MousePopupListener extends MouseAdapter {
    public void mousePressed(MouseEvent e) {
      checkPopup(e);
    }

    public void mouseClicked(MouseEvent e) {
      checkPopup(e);
    }

    public void mouseReleased(MouseEvent e) {
      checkPopup(e);
    }

    private void checkPopup(MouseEvent e) {
      if (e.isPopupTrigger()) {
        popup.show(PopupMenuExample.this, e.getX(), e.getY());
      }
    }
  }

  // An inner class to show when popup events occur
  class PopupPrintListener implements PopupMenuListener {
    public void popupMenuWillBecomeVisible(PopupMenuEvent e) {
      System.out.println("Popup menu will be visible!");
    }

    public void popupMenuWillBecomeInvisible(PopupMenuEvent e) {
      System.out.println("Popup menu will be invisible!");
    }

    public void popupMenuCanceled(PopupMenuEvent e) {
      System.out.println("Popup menu is hidden!");
    }
  }

  public static void main(String s[]) {
    JFrame frame = new JFrame("Popup Menu Example");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setContentPane(new PopupMenuExample());
    frame.setSize(300, 300);
    frame.setVisible(true);
  }
}

OUTPUT:

COMMENT TO SHOW APPRECIATION