java编写可添加图片的屏保程序

以下是一个简单的 Java 屏幕保护程序，可以在屏幕上显示一些随机的图片：

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.RenderingHints;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Random;

import javax.imageio.ImageIO;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.Timer;

public class ScreenSaver extends JPanel implements ActionListener {
    private static final long serialVersionUID = 1L;
    private static final int DELAY = 50; // 屏幕刷新时间间隔
    private static final int NUM_IMAGES = 10; // 图片数量
    private static final int MAX_ROTATION_SPEED = 3; // 图片旋转速度的最大值

    private ArrayList<Image> images = new ArrayList<Image>(); // 图片列表
    private ArrayList<AffineTransform> transforms = new ArrayList<AffineTransform>(); // 变换矩阵列表
    private Random rand = new Random(); // 随机数生成器
    private Timer timer; // 定时器

    public ScreenSaver() {
        // 加载图片
        for (int i = 0; i < NUM_IMAGES; i++) {
            try {
                Image image = ImageIO.read(new File("image" + i + ".jpg"));
                images.add(image);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        // 初始化变换矩阵
        for (int i = 0; i < NUM_IMAGES; i++) {
            AffineTransform transform = new AffineTransform();
            transform.translate(rand.nextInt(getWidth()), rand.nextInt(getHeight()));
            transform.rotate(rand.nextDouble() * Math.PI * 2);
            transforms.add(transform);
        }

        // 启动定时器
        timer = new Timer(DELAY, this);
        timer.start();
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        // 更新变换矩阵
        for (int i = 0; i < NUM_IMAGES; i++) {
            AffineTransform transform = transforms.get(i);
            double rotationSpeed = rand.nextDouble() * MAX_ROTATION_SPEED;
            transform.rotate(rotationSpeed / 180.0 * Math.PI);
            transforms.set(i, transform);
        }

        // 重新绘制屏幕
        repaint();
    }

    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);

        Graphics2D g2d = (Graphics2D) g.create();
        g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

        // 绘制背景
        g2d.setColor(Color.BLACK);
        g2d.fillRect(0, 0, getWidth(), getHeight());

        // 绘制图片
        for (int i = 0; i < NUM_IMAGES; i++) {
            Image image = images.get(i);
            AffineTransform transform = transforms.get(i);
            g2d.drawImage(image, transform, null);
        }

        g2d.dispose();
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame("Screen Saver");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setExtendedState(JFrame.MAXIMIZED_BOTH);
        frame.setUndecorated(true);
        ScreenSaver saver = new ScreenSaver();
        frame.add(saver);
        frame.setVisible(true);
    }
}

你需要将图片保存在程序所在目录下，文件名为 "image0.jpg" 到 "image9.jpg"。你也可以修改程序中的常量来调整程序的行为。