Running a minecraft server from within my own program

Question

I am trying to set up a minecraft server, for fun, and want to add a control panel to make managing it easier. Part of this control panel is to run the server FROM the panel to reduce miss-clicking the exit button and what-not. (the minecraft server is a non-runnable .jar file, implying you have to make a .bat to run it from the command line) I know how to run the server inside my program, as well as print the output, here:

ProcessBuilder pb = new ProcessBuilder("java", "-jar", "gscale.jar");
        pb.redirectErrorStream(true);
        pb.directory(new File("F:\\Documents and Settings\\Administrator\\Desktop"));

        System.out.println("Directory: " + pb.directory().getAbsolutePath());
        Process p = pb.start();
        InputStream is = p.getInputStream();
        BufferedReader br = new BufferedReader(new InputStreamReader(is));
        for (String line = br.readLine(); line != null; line = br.readLine()) {
                System.out.println( line ); // Or just ignore it
        }
        p.waitFor();

but, with this, i'm not sure how to implement an input method. for example, if I click a button, it sends the input "stop" to the external jar to stop the server, as it does without this command panel. how would I implement that? the code above I plan to be running in it's own thread, but maybe i'm doing this all wrong?

Thanks in advance!

Gorham

Do you have your code on an open source platform such as github? Would you be willing to? I'm trying to do something similar. So that I can run a single server with a number of mod packs that would all run just one at a time on demand. If you'd be willing to share your code I'd love to add to it and of course I would be willing to share my collaborations. – Semipro

Answer 1

Looks like the Process class has a getOutputStream() method. You could try something like this:

OutputStream os = p.getOutputStream();
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(os));
bw.write("stop");
bw.newLine();
bw.flush();

Hatten