DiscordPresenceMinn.java

import club.minnced.discord.rpc.DiscordEventHandlers;
import club.minnced.discord.rpc.DiscordRPC;
import club.minnced.discord.rpc.DiscordRichPresence;

public class DiscordPresenceMinn {
    
    public static void launch() {
        DiscordRPC lib = DiscordRPC.INSTANCE;
        String applicationId = "REDACTED";
        String steamId = "";
        DiscordEventHandlers handlers = new DiscordEventHandlers();
        handlers.ready = (user) -> System.out.println("Ready!");
        lib.Discord_Initialize(applicationId, handlers, true, steamId);
        DiscordRichPresence presence = new DiscordRichPresence();
        presence.startTimestamp = System.currentTimeMillis() / 1000; // epoch second
        presence.details = "Using Minn API";
        lib.Discord_UpdatePresence(presence);
        // in a worker thread
        new Thread(() -> {
            while (!Thread.currentThread().isInterrupted()) {
                lib.Discord_RunCallbacks();
                try {
                    Thread.sleep(2000);
                } catch (InterruptedException ignored) {}
            }
        }, "RPC-Callback-Handler").start();
    }
}

Main.java

    public static void main(String[] args) {
        parseArguments(args);
        System.setProperty("java.net.preferIPv4Stack", "true");

        if (!printToConsole)
            ErrorStore.setOutputToFile();

        DiscordPresenceMinn.launch();

        GameLoop loop = new GameLoop();
        Keyboard keyboard = new Keyboard();
        Mouse mouse = new Mouse();

        RSApplet applet = buildApplet(keyboard, mouse);
        Game game = buildClient(applet, loop, keyboard, mouse);

        buildFrame(applet);
        loop.start(game);
    }