Java Swing | JPopupMenu
JPopupMenu is a class of javax.swing package . It is an implementation of PopupMenu . JPopupMenu generates a small window that pops up and displays a series of choices. JPopupMenu can be used to generate a small window at any position within the container.
Constructor of the class are :
- JPopupMenu() : creates a popup menu with empty name
- JPopupMenu(String name) : creates a popup menu with specified title.
Commonly used methods of JPopupMenu are :
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- add(JMenuItem menuItem) : add menuItem to the popup menu.
- add(String s) : add String to the popup menu .
- String getLabel() : get the popup menu’s label.
- boolean is Visible() : returns whether the JPopup menu is visible or not.
- setLabel(String s) : sets the popup menu’s label.
- setLocation(int x, int y) : sets the pop up menu’s location to the given coordinates
- setPopupSize(int width, int height) : set the popup size to give height and width
- setVisible(boolean b) : sets the visibility of the pop up menu, visible if true is passed as argument or vice versa.
- show(Component c, int x, int y) : displays the popup menu at x, y position within the component c.
1. Program to show a simple popup menu
Java
// Java program to show a simple popup menuimport java.awt.*;import java.awt.event.*;import javax.swing.*;class Popup extends JFrame implements ActionListener { // java button static JButton b; // java frame static JFrame f; // popup menu static JPopupMenu pm; // default constructor Popup() { } // main class public static void main(String[] args) { // create a frame f = new JFrame("Popup"); // set the size of the frame f.setSize(400, 400); // close the frame when close button is pressed f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // create anew panel JPanel p = new JPanel(); // create an object of mouse class Popup pop = new Popup(); // create a button b = new JButton("click"); // addActionListener b.addActionListener(pop); p.add(b); f.add(p); f.show(); } // when the button is clicked public void actionPerformed(ActionEvent e) { String s = e.getActionCommand(); if (s.equals("click")) { // create a popup menu pm = new JPopupMenu("Message"); // create a label JLabel l = new JLabel("this is the popup menu"); // add the label to the popup pm.add(l); // add the popup to the frame pm.show(f, 100, 100); } }} |
Output :
2.Program to show a popup menu and menu items to it
Java
// Java program to show a popup menu// and menu items to itimport java.awt.*;import java.awt.event.*;import javax.swing.*;class Popup extends JFrame implements ActionListener { // java button static JButton b; // java frame static JFrame f; // popup menu static JPopupMenu pm; // JLabel JLabel l; // default constructor Popup() { } // main class public static void main(String[] args) { // create a frame f = new JFrame("Popup"); // set the size of the frame f.setSize(400, 400); // close the frame when close button is pressed f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // create anew panel JPanel p = new JPanel(); // create an object of mouse class Popup pop = new Popup(); // create a button b = new JButton("click"); // addActionListener b.addActionListener(pop); // create a popup menu pm = new JPopupMenu("Message"); // create menuItems JMenuItem m1 = new JMenuItem("Item1"); JMenuItem m2 = new JMenuItem("Item2"); JMenuItem m3 = new JMenuItem("Item3"); // create a Jlabel JLabel l = new JLabel("nothing clicked"); // add menuitems to popup menu pm.add(m1); pm.add(m2); pm.add(m3); // addActionListener m1.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { l.setText("Item 1 clicked."); } }); m2.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { l.setText("Item 2 clicked."); } }); m3.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { l.setText("Item 3 clicked."); } }); // add button and label to frame p.add(b); p.add(l); f.add(p); f.show(); } // when the button is clicked public void actionPerformed(ActionEvent e) { String s = e.getActionCommand(); if (s.equals("click")) { // add the popup to the frame pm.show(f, 200, 200); } }} |
Output :
Note : This codes might not run in a online IDE please use an offline compiler
