Convert a coordinate on a screen to a coordinate relative to a component's bounds : SwingUtilities « Swing « Java Tutorial

1. Java Tutorial
2. Swing
3. SwingUtilities

import java.awt.Point;

import javax.swing.JButton;
import javax.swing.SwingUtilities;

public class Main {
  public static void main(String[] argv) {
    JButton component = new JButton();
    Point pt = new Point(component.getLocation());

    SwingUtilities.convertPointFromScreen(pt, component);
  }
}