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This article mainly introduces "Java how to implement screenshot widget". In daily operation, I believe many people have doubts about how Java implements screenshot widget. Xiaobian consulted all kinds of materials and sorted out simple and easy operation methods. I hope to help you answer the doubts of "Java how to implement screenshot widget"! Next, please follow the small series to learn together!

effect display

code display import javax.imageio.ImageIO;import javax.swing.*; import java.awt.*; import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.image.BufferedImage;import java.io.File;import java.io.IOException;public class PrintScreen extends JFrame{ PrintScreen(){ this.setTitle("Java Screenshot Widget"); this.setSize(400,300); this.setVisible(true); this.setDefaultCloseOperation(EXIT_ON_CLOSE); JButton jButton=new JButton("click screenshot"); jButton.setSize(120,60); setLayout(new FlowLayout()); getContentPane().add(jButton); //add listening events for buttons jButton.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { try { PrintScreen(); } catch (AWTException | IOException ex) { throw new RuntimeException(ex); } } }); } //Implement screenshot function public static void PrintScreen() throws AWTException, IOException { Dimension screenSize=Toolkit.getDefaultToolkit().getScreenSize(); int width=(int)screenSize.getWidth(); int height=(int)screenSize.getHeight(); Robot robot=new Robot(); BufferedImage bi=robot.createScreenCapture(new Rectangle(width,height)); ImageIO.write(bi,"png",new File("C:\\Users\\Administrator\\Desktop","previous screenshot.png")); } public static void main(String[] args){ PrintScreen printScreen=new PrintScreen(); }} Project Structure

This procedure for beginners to learn, simple structure, all functions in the main class to achieve.

design ideas

First draw the window, add button components, and then add listening events for buttons to achieve screenshot function. The new screenshot is placed on the desktop and named PreviousScreenshot.png. This path can be changed according to your needs.

Exception handling and event handling in this program is the focus, but also an important part of Java advanced learning, although GUI is not a big market now, and even a lot of Java beginners give up learning GUI technology, but the use of GUI programming process for training interest in programming, in-depth understanding of Java programming has a great role.

The program can also be optimized for capturing screenshots of different shapes to meet user needs. By adding coordinate variables to intercept the required pixels on the screen. At the same time, you can also beautify this simple window. This procedure is a good project to learn Java programming practice.

project test

Run the program, click the screenshot button, and generate a file named "previous screenshot.png" under the target file path, as shown in the above figure.

At this point, the study of "how to implement screenshot widget in Java" is over, hoping to solve everyone's doubts. Theory and practice can better match to help you learn, go and try it! If you want to continue learning more relevant knowledge, please continue to pay attention to the website, Xiaobian will continue to strive to bring more practical articles for everyone!

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