JAVA (JFrames) Dispay the color and RGB value of the background wherever the mouse is on the screen. Solution //Move cursor for get the color value import java.awt.AWTException; import java.awt.BorderLayout; import java.awt.Color; import java.awt.EventQueue; import java.awt.GridBagLayout; import java.awt.HeadlessException; import java.awt.MouseInfo; import java.awt.Point; import java.awt.PointerInfo; import java.awt.Robot; import java.io.IOException; import static java.lang.Thread.MIN_PRIORITY; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.SwingUtilities; import javax.swing.UIManager; import javax.swing.UnsupportedLookAndFeelException; import static java.lang.Thread.sleep; import javax.swing.BorderFactory; import javax.swing.border.Border; import javax.swing.border.LineBorder; public class ColorFinder { /** * * @param args * @throws IOException */ public static void main(String[] args) throws IOException { new ColorFinder(); } public ColorFinder() { EventQueue.invokeLater(new Runnable() { @Override public void run() { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) { } try { JFrame frame = new JFrame(\"Color Finder\"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setLayout(new BorderLayout()); frame.add(new MouseColorPane()); frame.setSize(600, 400); frame.getContentPane().setBackground(Color.yellow); frame.setLocationRelativeTo(null); frame.setVisible(true); } catch (HeadlessException | AWTException exp) { } } }); } public class MouseColorPane extends JPanel implements MouseMonitorListener { private final Robot robot; private final JLabel label; /** * * @throws AWTException */ public MouseColorPane() throws AWTException { JPanel panel = new JPanel(); panel.setBorder(BorderFactory.createLineBorder(Color.black)); label = new JLabel(); label.setOpaque(true); label.setBackground(Color.WHITE); panel.setBounds(250,50 , 200, 50); panel.add(label); add(panel); robot = new Robot(); PointerInfo pi = MouseInfo.getPointerInfo(); updateColor(pi.getLocation()); MouseMonitor monitor = new MouseMonitor(); monitor.setMouseMonitorListener(this); monitor.start(); } /** * * @param p */ protected void updateColor(Point p) { Color pixelColor = robot.getPixelColor(p.x, p.y); // label.setText(p.x + \"x\" + p.y + \" = \" + pixelColor); label.setText(\"Red:\"+pixelColor.getRed()+\" // \" + \"Green\" + pixelColor.getGreen()+\" // \" + \"Blue:\" + pixelColor.getBlue()); setBackground(pixelColor); } /** * * @param p */ @Override public void mousePositionChanged(final Point p) { SwingUtilities.invokeLater(new Runnable() { @Override public void run() { updateColor(p); } }); } } public interface MouseMonitorListener { public void mousePositionChanged(Point p); } public static class MouseMonitor extends Thread { private Point lastPoint; private MouseMonitorListe.

1. JAVA (JFrames)
Dispay the color and RGB value of the background wherever the mouse is on the screen.
Solution
//Move cursor for get the color value
import java.awt.AWTException;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.GridBagLayout;
import java.awt.HeadlessException;
import java.awt.MouseInfo;
import java.awt.Point;
import java.awt.PointerInfo;
import java.awt.Robot;
import java.io.IOException;
import static java.lang.Thread.MIN_PRIORITY;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import static java.lang.Thread.sleep;
import javax.swing.BorderFactory;
import javax.swing.border.Border;
import javax.swing.border.LineBorder;
public class ColorFinder {
/**
*
* @param args
* @throws IOException
*/

2. public static void main(String[] args) throws IOException {
new ColorFinder();
}
public ColorFinder() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException |
UnsupportedLookAndFeelException ex) {
}
try {
JFrame frame = new JFrame("Color Finder");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(new MouseColorPane());
frame.setSize(600, 400);
frame.getContentPane().setBackground(Color.yellow);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
} catch (HeadlessException | AWTException exp) {
}
}
});
}
public class MouseColorPane extends JPanel implements MouseMonitorListener {
private final Robot robot;
private final JLabel label;
/**
*
* @throws AWTException
*/
public MouseColorPane() throws AWTException {
JPanel panel = new JPanel();

3. panel.setBorder(BorderFactory.createLineBorder(Color.black));
label = new JLabel();
label.setOpaque(true);
label.setBackground(Color.WHITE);
panel.setBounds(250,50 , 200, 50);
panel.add(label);
add(panel);
robot = new Robot();
PointerInfo pi = MouseInfo.getPointerInfo();
updateColor(pi.getLocation());
MouseMonitor monitor = new MouseMonitor();
monitor.setMouseMonitorListener(this);
monitor.start();
}
/**
*
* @param p
*/
protected void updateColor(Point p) {
Color pixelColor = robot.getPixelColor(p.x, p.y);
// label.setText(p.x + "x" + p.y + " = " + pixelColor);
label.setText("Red:"+pixelColor.getRed()+" // " + "Green" + pixelColor.getGreen()+" // "
+ "Blue:" + pixelColor.getBlue());
setBackground(pixelColor);
}
/**
*
* @param p
*/
@Override
public void mousePositionChanged(final Point p) {
SwingUtilities.invokeLater(new Runnable() {
@Override

4. public void run() {
updateColor(p);
}
});
}
}
public interface MouseMonitorListener {
public void mousePositionChanged(Point p);
}
public static class MouseMonitor extends Thread {
private Point lastPoint;
private MouseMonitorListener listener;
public MouseMonitor() {
setDaemon(true);
setPriority(MIN_PRIORITY);
}
public void setMouseMonitorListener(MouseMonitorListener listener) {
this.listener = listener;
}
public MouseMonitorListener getMouseMonitorListener() {
return listener;
}
protected Point getMouseCursorPoint() {
PointerInfo pi = MouseInfo.getPointerInfo();
return pi.getLocation();
}
@Override
public void run() {
lastPoint = getMouseCursorPoint();
while (true) {
try {
sleep(250);
} catch (InterruptedException ex) {
}
Point currentPoint = getMouseCursorPoint();
if (!currentPoint.equals(lastPoint)) {

5. lastPoint = currentPoint;
MouseMonitorListener listener = getMouseMonitorListener();
if (listener != null) {
listener.mousePositionChanged((Point) lastPoint.clone());
}
}
}
}
}
}