使用java程序 在window系统实现靠屏幕边缘悬浮球 给出程序示例

以下是一个简单的 Java 程序示例，可以实现在 Windows 系统上实现靠屏幕边缘悬浮球的功能。

import java.awt.*;
import javax.swing.*;

public class FloatingBall extends JFrame {
    private JPanel ballPanel;
    private int ballRadius = 50;
    private int ballPosX = 0;
    private int ballPosY = 0;
    private int screenWidth;
    private int screenHeight;
    private int directionX = 1;
    private int directionY = 1;

    public FloatingBall() {
        // 获取屏幕尺寸
        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
        screenWidth = screenSize.width;
        screenHeight = screenSize.height;

        // 创建悬浮球面板
        ballPanel = new JPanel() {
            protected void paintComponent(Graphics g) {
                super.paintComponent(g);
                g.setColor(Color.RED);
                g.fillOval(ballPosX, ballPosY, ballRadius, ballRadius);
            }
        };
        ballPanel.setPreferredSize(new Dimension(ballRadius, ballRadius));

        // 设置窗口属性
        setUndecorated(true);
        setAlwaysOnTop(true);
        setResizable(false);
        add(ballPanel);
        pack();
        setLocation(screenWidth - ballRadius, screenHeight - ballRadius);

        // 悬浮球移动
        Thread ballThread = new Thread() {
            public void run() {
                while (true) {
                    if (ballPosX <= 0) {
                        directionX = 1;
                    } else if (ballPosX + ballRadius >= screenWidth) {
                        directionX = -1;
                    }
                    if (ballPosY <= 0) {
                        directionY = 1;
                    } else if (ballPosY + ballRadius >= screenHeight) {
                        directionY = -1;
                    }
                    ballPosX += directionX * 5;
                    ballPosY += directionY * 5;
                    ballPanel.repaint();
                    try {
                        Thread.sleep(50);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            }
        };
        ballThread.start();
    }

    public static void main(String[] args) {
        FloatingBall floatingBall = new FloatingBall();
        floatingBall.setVisible(true);
    }
}

该程序使用了 Java 的 Swing 组件来实现界面的绘制，通过设置窗口的属性和位置，使其在屏幕边缘悬浮。同时，使用线程来实现悬浮球的移动，每次移动的距离为 5 个像素。你可以根据自己的需要来修改代码中的参数。