Java机器人类 |获取给定点的像素颜色

机器人是Java.awt 包的一部分。 Robot 类主要用于生成本地系统输入事件，用于自运行演示、测试自动化和其他使用鼠标和键盘控制的应用程序。
Robot 类生成可用于控制鼠标、键盘和截屏的事件。
在本文中，我们将讨论如何获取用户提到的屏幕上点的像素颜色。
使用方法：

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

在下面的程序中，我们将打印一个标签，其中包含输入像素的 RGB 值，标签的文本将是像素颜色

Java

// Java program to get the pixel color of
// given screen coordinates
import 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());
        }
    }
}

输出 ：

注意：以下程序可能无法在在线编译器中运行，请使用离线 IDE。