Re: Display tooltips on a region of an image

Knute Johnson <>
Wed, 16 Mar 2011 15:27:58 -0700
On 03/16/2011 03:09 AM, SamuelXiao wrote:

Hi all, I need to make an image to display tooltips under certain
coordiante. For instance, the image is 600 * 600, when a user move
mouse cursor to a particular area, say x:from 100 to 200;y:from 200 to
300;these area will give tooltips displaying some message.

I wonder if there is any way to do this or any alternative solution?
Googled solutions gave that display tooltips with images which is not
what I want.

Any help would be highly appreciated.

This is a simple solution with one bad side effect that you can't do any
other mouse event operations on the component.

import java.awt.*;
import java.awt.geom.*;
import java.awt.image.*;
import javax.imageio.*;
import javax.swing.*;

public class test extends JPanel {
     private BufferedImage img = null;
     final Ellipse2D.Double face = new Ellipse2D.Double(359,143,40,40);

     public test() {
         try {
             URL url =
              new URL("");
             img =;
              new Dimension(img.getWidth(),img.getHeight()));
         } catch (Exception e) {
         setToolTipText("White Cat Face");

     public boolean contains(int x, int y) {
         return face.contains(x,y);

     public void paintComponent(Graphics g) {

     public static void main(String[] args) {
         EventQueue.invokeLater(new Runnable() {
             public void run() {
                 JFrame f = new JFrame();
                 test t = new test();


Knute Johnson

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