Java Robot Class | Get the pixel Color of a given point

Robot is part of java.awt package . Robot class is basically used to generate native system input events for the purposes of self- running demos, test automation, and other application where control over mouse and keyboard is used.
Robot class generates events that can be used to control mouse, keyboard and can be used to take screenshot of the screen.
In this article we will discuss how to get the pixel color of the point on the screen mentioned by the user.

Method used :

getPixelColor(int x, int y)  
This function returns an object of the color class 
of the given screen coordinates. 

In the following program we will print a label that will contain the RGB values of the pixel entered and the text of the label will be of the pixel Color





// Java program to get the pixel color of
// given screen coordinates
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class colour extends JFrame
    implements ActionListener {
    // textfield to get x, y coordinates
    static JTextField x, y;
    // button
    static JButton b;
    // create a frame
    static JFrame f;
    // label
    static JLabel l;
    public static void main()
        // create a frame
        f = new JFrame("pixel Color");
        // label to show the RGB value
        l = new JLabel("no value");
        // create the text field
        x = new JTextField(16);
        y = new JTextField(16);
        // create a button
        b = new JButton("find");
        // create an object of the class
        colour co = new colour();
        // add ActionListener
        // create a panel
        JPanel p = new JPanel();
        // add textfield and utton to the panel
        // add the panel
        // set the size of the frame
        f.setSize(500, 500);;
    // if the button is pressed
    public void actionPerformed(ActionEvent e)
        String s = e.getActionCommand();
        if (s.equals("find")) {
            int xp, yp;
            // get user inputs of x and y position
            xp = Integer.parseInt(x.getText());
            yp = Integer.parseInt(y.getText());
            // try and catch block to handle exceptions
            try {
                // create an object of robot class
                Robot r = new Robot();
                // get the pixel color
                c = r.getPixelColor(xp, yp);
            catch (Exception evt) {
                // print error message
            Color c;
            // set the RGB value to the label
            // and to its foreground
            l.setText("Red = " + c.getRed() + ", 
Green = " + c.getGreen() + ", Blue = " + c.getBlue());


Output :

Note : the following program might not run in an online compiler please use an offline IDE.

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Third year Department of Information Technology Jadavpur University

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