Pop Up Text in an applet on mouse over event

Question

Can anyone help me to design a pop up text message to be displayed in an applet on moving your mouse over a particular control. Plz. Its urgent

Answer 1

To show a pop-up use javax.swing.Popup. Add a mouse listener to button. When mouse enters the button pop-up shows and when mouse exited the button, pop-up disappears. This pop-up is capable of displaying simple message to any swing component. Sample code:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
* @author mrityunjoy_saha
* @version 1.0
public class AppletWithPopup extends JApplet {
    private Popup popup;
    private JButton button;
    private JLabel message;
    @Override
    public void init() {
        setLayout(new FlowLayout());
        button = new JButton("Hello");
        message = new JLabel("This is a JLabel. It can be any swing component.");
        button.addMouseListener(new MyMouseListener());
        add(button);
    private class MyMouseListener extends MouseAdapter {
        @Override
        public void mouseEntered(MouseEvent e) {
            System.out.println("Mouse entered.");
            PopupFactory factory = PopupFactory.getSharedInstance();
            popup = factory.getPopup(AppletWithPopup.this, message, (int) button.getLocationOnScreen().
                    getX() - 20, (int) button.getLocationOnScreen().getY() + 40);
            //popup = factory.getPopup(AppletWithPopup.this, message, 50, 10);
            popup.show();
        @Override
        public void mouseExited(MouseEvent e) {
            System.out.println("Mouse exited.");
            if (popup != null) {
                popup.hide();
}If you are talking about alert box (where some message can be displayed), in above example instead of javax.swing.Popup use javax.swing.JOptionPane. In case you are using JOptionPane, make it visible in mouseEntered() method and hide it in mouseExited() method.
Thanks,
Mrityunjoy