small config with gson

Config.java

public class Config {
    private static Gson GSON = new GsonBuilder().setPrettyPrinting().create(); // got a bunch of cool config options

    int someIntValue = 5; // field where the values will be held, default value would be 5
    String aString = "hello world"; // lots of standard types work, you can always register new deserializers in your GSON instance. google it.

    public static Config readConfig() {
        Path configFile = FabricLoader.getInstance().getConfigDir().resolve("filename.json");
        try {
            // read file contents and let gson construct an instance of it
            return GSON.fromJson(Files.readString(configFile), Config.class);
        }
        catch (IOException e) {
            // handle failure somehow, crash the game, use all default values, whatever
            throw new RuntimeException(e);
        }
    }

    public void writeConfig() {
        Path configFile = FabricLoader.getInstance().getConfigDir().resolve("filename.json");
        try {
            // write the config to file
            Files.writeString(configFile, GSON.toJson(this));
        }
        catch (IOException e) {
            // handle failure somehow
            throw new RuntimeException(e);
        }
    }
}