Thread: Creating button from image and selecting clickable area

Maybe it is not possible, but i'm just wonderring, if it's possible and if there is an easy to do this : i have a button with icon, and my icon is in circle shape, but button is quadratic, so i would like to leave visible only icon, and make clickable only the icon, not the whole hidden button. Is it possible ? And if it is, maybe there is another easy way to do this ?
I.e., i have a button http://s23.postimg.org/bf7n6j397/aaa.png , red is my icon, and blue is the rest of the button, and want to make a blue area unclickable, only red would act as a button. The point is that i want a circle button.

My code is something like that :

import javax.swing.JButton;
import javax.swing.ImageIcon;
import java.awt.Insets;
 
class ImageButton extends JButton {
 
  public ImageButton(String img) {
    this(new ImageIcon(img));
  }
 
  public ImageButton(ImageIcon icon) {
    setIcon(icon);
    setMargin(new Insets(0, 0, 0, 0));
    setIconTextGap(0);
    setBorderPainted(false);
    setOpaque(false);
    setBorder(null);
    setText(null);
    setSize(icon.getImage().getWidth(null), icon.getImage().getHeight(null));
  }
 
}
 
final ImageButton button = new ImageButton("http://www.javaprogrammingforums.com/images/Default.png");