Question

我正在尝试使用TrayIcon在Windows 8.1中显示基本系统托盘消息。但是，当我运行程序时，没有任何东西出现。这是代码：

package alert1;

import java.net.*;
import java.io.*;
import java.util.*;
import java.awt.*;
import javax.imageio.*;

public class Main {
    public static void main(String[] args) throws IOException {
        URL gfl = new URL("http://gflclan.com/GFL/serverlist.php");
        BufferedReader in = new BufferedReader(new InputStreamReader(gfl.openStream()));

        Image img = ImageIO.read(new File("gflicon.jpg"));
        TrayIcon tray = new TrayIcon(img);

        System.out.println("Enter name of map: ");
        Scanner scan = new Scanner(System.in); //retrieves name of map from IO
        String str = scan.nextLine();
        scan.close();

                            //pL = previousLine
        String pL1 = null;  //line which contains the server name
        String pL2 = null;
        String pL3 = null;
        String pL4 = null;  //line which contains the server IP
        String pL5 = null;
        String currentLine;
        while ((currentLine = in.readLine()) != null)
            if(currentLine.contains(str)){
                String pL1fixed = pL1.replaceAll("\\<.*?\\> ?", "").trim(); //removes HTML/CSS formatting
                String pL4fixed = pL4.replaceAll("\\<.*?\\> ?", "").trim();
                System.out.println("Server Name: " + pL1fixed);
                System.out.println("Server IP: " + pL4fixed);
                tray.displayMessage("Server Found", "[Server Info Here]", TrayIcon.MessageType.WARNING);
            } else {
                pL1 = pL2; //updates stream's line history
                pL2 = pL3;
                pL3 = pL4;
                pL4 = pL5;
                pL5 = currentLine;
            }
        in.close();
    }
}

我有什么遗失的吗？据我所知，我有TrayIcon对象，我已经调用了displayMessage，所以我不知道为什么它没有显示出来。这是我的第一个Java项目，也是我第一次使用图像，如果这段代码非常业余，请原谅我。

Answer 1

首先，请查看How to Use the System Tray和JavaDocs for SystemTray，其中包含多个示例

基本上，您没有将TrayIcon添加到任何内容

取自SystemTray JavaDocs

的缩写示例

if (SystemTray.isSupported()) {
     SystemTray tray = SystemTray.getSystemTray();
     Image image = ...;
     trayIcon = new TrayIcon(image, "Tray Demo");
     try {
         tray.add(trayIcon);
     } catch (AWTException e) {
         System.err.println(e);
     }
}

其次，你真的不应该将基于控制台的程序与GUI混合使用，它们有不同的工作方式，这些方式通常彼此不兼容

Java TrayIcon消息未显示

1 个答案: