How painting behind a JComponent ?

Question

Hi all,
I'm trying to paint stuff like shadows, frames (not borders), etc. behind JComponents.
So every shape only intersects with the relative JComponent's one.
Cannot paint these stuff in the container's paintComponent() method since more widgets can have one or more of them, so I guess It should be better do the job in every child's paintComponent() method.
What follows was the code I tested but doesn't work.
Any hints ? Thanks in advance.
Lucio
import java.awt.*;
import javax.swing.*;
public class UpButton extends JButton {
    Dimension dimension = new Dimension(100, 100);
    Point point = new Point(100, 100);
    public UpButton(String text) {
     setSize(dimension);
     setLocation(point);
     setBackground(new Color(255,186,26));
     setText(text);
    public void paintComponent(Graphics g) {
     Component c = (Component) getParent();
     Graphics2D g2 = (Graphics2D)
                                  c.getGraphics().create(0,0,dimension.width,dimension.height);
     g2.translate(-(point.x + 10), -(point.y + 5));
     g2.setPaint(Color.gray);
     g2.fill(new Rectangle(dimension));
     g2.dispose();
     super.paintComponent(g);
    public static void main(String[] args) {
     JFrame jFrame = new JFrame();
     jFrame.getContentPane().setLayout(null);
     jFrame.add(new UpButton("Test"));
     jFrame.setSize(300,300);
     jFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     jFrame.setVisible(true);
}

Answer 1

I'm very grateful to you, weebib
I was missing the setClip method, now perfectly works.
It doesn't seems to me too difficult (now ;-)
Here my modified version :
import java.awt.*;
import javax.swing.*;
public class UpButton extends JButton {
    Dimension dimension = new Dimension(100, 100);
    Point point = new Point(100, 100);
    public UpButton(String text) {
     setSize(dimension);
     setLocation(point);
     setBackground(new Color(255,186,26));
     setText(text);
    public void paintComponent(Graphics g) {
     Graphics2D g2 = (Graphics2D) g.create();
     g2.translate(10, 5);
     g2.setClip(0, 0, 100, 100);
     g2.setPaint(Color.gray);
     g2.fill(new Rectangle(dimension));
     g2.dispose();
     super.paintComponent(g);
    public static void main(String[] args) {
     JFrame jFrame = new JFrame();
     jFrame.getContentPane().setLayout(null);
     jFrame.add(new UpButton("Test"));
     jFrame.setSize(300,300);
     jFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     jFrame.setVisible(true);
}