JPopupMenu Example
A JPopupMenu is a small window that pops up and displays a series of choices. A JPopupMenu can be used for the menu that appears when the user selects from a menu bar or menu item.
The JPopupMenu can also be used, as here, when you want it to appear when the user right-clicks in a specified area.
// JPopupMenu Example
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
class JPopupMenuExample {
static JPopupMenu menu = new JPopupMenu("Popup");
static void addItem(final String s) {
JMenuItem item = new JMenuItem(s);
item.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.out.println(e.getActionCommand()+" selected");}
});
menu.add(item);
}
public static void main(String[] args) {
JPanel panel = new JPanel();
panel.addMouseListener(new MouseAdapter() {
public void mousePressed(MouseEvent e) {
if(e.isPopupTrigger())
menu.show(e.getComponent(),e.getX(),e.getY());
}
public void mouseReleased(MouseEvent e) {
if(e.isPopupTrigger())
menu.show(e.getComponent(),e.getX(),e.getY());
}
});
addItem("item a");addItem("item b");addItem("item c");
JFrame frame = new JFrame();
Container cp = frame.getContentPane();
cp.add(panel);
frame.setSize(200,100);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}