Java JPopupMenu

Java JPopupMenu

Java JPopupMenu always pop up at any position of a component.JPopup Menu inherits from JComponent class.

How to declare Java JPopupMenu

[class JPopupMenu extends JComponent implements Accessible, MenuElement]

JPopupMenu constructors

• JPopupMenu()-constructs JPopupMenu with no invoker.
• JPopupMenu(String s)-constructs JPopupMenu with a title.

Java JPopupMenu Example

[

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

]

Java JPopupMenu Example with MouseListener and ActionListener

[

import javax.swing.*;
import java.awt.event.*;
class PopupMenuExample
{
    PopupMenuExample(){
        final JFrame frame= new JFrame("PopupMenu Example");
        final JPopupMenu menu = new JPopupMenu("Edit");
        final JTextArea area=new JTextArea();
        area.setSize(200,200);
        area.setBounds(50,50,200,200);
        frame.add(area);
        JMenuItem cut = new JMenuItem("Cut");
        JMenuItem copy = new JMenuItem("Copy");
        JMenuItem paste = new JMenuItem("Paste");
        JMenuItem selectAll = new JMenuItem("Select All");
        cut.addActionListener( new ActionListener()
        {
            public void actionPerformed(ActionEvent event)
            {
                area.cut();
            }
            {

            }
        });

        copy.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent event)
            {
                area.copy();
            }
        });

        paste.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent event)
            {
                area.paste();
            }
        });
        selectAll.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent event)
            {
                area.selectAll();
            }
        });



        menu.add(cut); menu.add(copy); menu.add(paste);
        menu.add(selectAll);
        frame.addMouseListener(new MouseAdapter() {
            public void mouseClicked(MouseEvent e) {
                menu.show(frame , e.getX(), e.getY());
            }
        });
        frame.add(menu);
        frame.setSize(400,400);
        frame.setLayout(null);
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }
    public static void main(String args[])
    {
        new PopupMenuExample();
    }}  

]

Output

Code Explanation

• [final JPopupMenu menu = new JPopupMenu("Edit");]-creates JPopupMenu with a string label.
• [final JFrame frame= new JFrame("PopupMenu Example");]-creates a JFrame window.
• [final JTextArea area=new JTextArea();]-creates JTextArea.

Code that performs JTextArea Actions

Code [cut.addActionListener( new ActionListener()

{
    public void actionPerformed(ActionEvent event)
    {
        area.cut();
    }
    {

    }

});] performs cut action on JTextArea.

Code [selectAll.addActionListener(new ActionListener()

        {
public void actionPerformed(ActionEvent event)
        {
        area.selectAll();
        }

        });] adds Anonymous class ActionListener to selectAll menu Item.

Other lessons you should also Learn.

How to add JMenuItem to JMenu

How to Implement ActionListener Interface