Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.awt.AWTException;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.HeadlessException;
import java.awt.MouseInfo;
import java.awt.Point;
import java.awt.Robot;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;

public class Main {
    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLayout(new BorderLayout());
        frame.add(new TestPane());
        frame.pack();
        frame.setVisible(true);
    }
}

class TestPane extends JPanel {
    public TestPane() {
        Thread thread = new Thread(new BackgroundMonitor());
        thread.setDaemon(true);
        thread.start();
    }

    @Override
    public Dimension getPreferredSize() {
        return new Dimension(200, 200);
    }

    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        Color color = getBackground();
        String text = color.getRed() + "x" + color.getGreen() + "x" + color.getBlue();

        g.drawString(text, 20, 30);
    }

    public class BackgroundMonitor implements Runnable {

        @Override
        public void run() {
            try {
                Robot robot = new Robot();

                Color previous = null;
                while (true) {
                    Point coord = MouseInfo.getPointerInfo().getLocation();
                    Color color = robot.getPixelColor((int) coord.getX(), (int) coord.getY());
                    if (previous == null || !previous.equals(color)) {
                        SwingUtilities.invokeLater(new UpdateBackgroud(color));
                    }
                    try {
                        Thread.sleep(250);
                    } catch (InterruptedException ex) {
                    }
                }
            } catch (AWTException | HeadlessException exp) {
                exp.printStackTrace();
            }
        }
    }

    class UpdateBackgroud implements Runnable {

        private Color color;

        public UpdateBackgroud(Color color) {
            this.color = color;
        }

        @Override
        public void run() {
            setBackground(color);
        }

    }
}