如何在JFrame中找到某个像素的颜色？

import java.awt.Color;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JFrame;

public class PixelColorFinder {
    public static void main(String[] args) {
        JFrame frame = new JFrame("Pixel Color Finder");
        frame.setSize(400, 400);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);

        frame.addMouseListener(new MouseAdapter() {
            @Override
            public void mouseClicked(MouseEvent e) {
                int x = e.getX();
                int y = e.getY();

                try {
                    Robot robot = new Robot();
                    Rectangle bounds = frame.getBounds();
                    Color color = robot.createScreenCapture(bounds).getPixelColor(x, y);

                    int red = color.getRed();
                    int green = color.getGreen();
                    int blue = color.getBlue();

                    System.out.println("Pixel color at (" + x + ", " + y + "): RGB(" + red + ", " + green + ", " + blue + ")");
                } catch (Exception ex) {
                    ex.printStackTrace();
                }
            }
        });
    }
}