给Java Swing程序添加系统托盘图标

可以使用Java AWT中的SystemTray类和TrayIcon类来实现在Java Swing程序中添加系统托盘图标的功能。以下是一个简单的示例代码：

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

public class TrayIconExample {

    public static void main(String[] args) {
        // Check if the system supports system tray
        if (!SystemTray.isSupported()) {
            System.out.println("SystemTray is not supported");
            return;
        }

        // Create a tray icon
        Image icon = new ImageIcon("icon.png").getImage();
        TrayIcon trayIcon = new TrayIcon(icon, "Tray Icon Example");

        // Add the tray icon to the system tray
        SystemTray tray = SystemTray.getSystemTray();
        try {
            tray.add(trayIcon);
        } catch (AWTException e) {
            System.out.println("TrayIcon could not be added");
            return;
        }

        // Show a message when the tray icon is clicked
        trayIcon.addActionListener(e -> JOptionPane.showMessageDialog(null, "Tray Icon Clicked"));

        // Create a popup menu for the tray icon
        PopupMenu popupMenu = new PopupMenu();
        MenuItem exitItem = new MenuItem("Exit");
        exitItem.addActionListener(e -> System.exit(0));
        popupMenu.add(exitItem);
        trayIcon.setPopupMenu(popupMenu);

        // Display a message in the tray icon tooltip
        trayIcon.setToolTip("This is a tray icon example");
    }
}

这个示例代码会创建一个系统托盘图标，并在点击图标时显示一个消息框。同时，它也为图标添加了一个弹出菜单和一个提示消息。注意，需要将图标文件放在程序运行的目录下，并将其命名为"icon.png"。