Java TrayIcon message not displaying

664 views Asked by At

I am trying to get a basic system tray message to appear in Windows 8.1 using TrayIcon. However, nothing is showing up when I run the program. This is the code:

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();
    }
}

Is there something I am missing? As far as I can tell, I have the TrayIcon object and I have called displayMessage on it, so I do not know why it is not showing up. This is my first Java project and my first time working with images so forgive me if this code is very amateur.

1

There are 1 answers

1
MadProgrammer On BEST ANSWER

First of all, take a look at How to Use the System Tray and the JavaDocs for SystemTray which have a number of examples

Basically, you're not adding your TrayIcon to anything

Abbreviated example taken from SystemTray JavaDocs

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);
     }
}

Second, you really shouldn't mix console based programs with GUI's, they have different ways of working which are generally incompatible with each other