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
// Java program to get the pixel color of// given screen coordinatesimport java.awt.*;import javax.swing.*;import java.awt.event.*;public class color 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 color co = new color(); // add ActionListener b.addActionListener(co); // create a panel JPanel p = new JPanel(); // add textfield and button to the panel p.add(x); p.add(y); p.add(b); p.add(l); // add the panel f.add(p); // set the size of the frame f.setSize(500, 500); f.show(); } // 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 System.err.println(evt.getMessage()); } Color c; // set the RGB value to the label // and to its foreground l.setForeground(c); 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.
