Clone the template and replace println("Hello World!") with player.sendMessage() .
// The magic ingredient modImplementation("net.fabricmc:fabric-language-kotlin:1.10.0+kotlin.1.9.0") Tell Fabric to use the Kotlin language adapter: kotlin for fabric
fun BlockView.isSkyExposed(pos: BlockPos): Boolean return getLightLevel(pos) >= 15 && !isRainOccluded(pos) Clone the template and replace println("Hello World
Let’s look at real modding scenarios. 1. Null Safety (Goodbye Crashes) Java: Null Safety (Goodbye Crashes) Java: | Feature |
| Feature | Benefit for Modders | | :--- | :--- | | | Forget @Nullable annotations. The compiler enforces null safety, eliminating NullPointerException crashes. | | Data Classes | One line of code for ItemStack , BlockPos , or custom component holders. | | Extension Functions | Add methods to PlayerEntity or World without inheritance or wrappers. | | Coroutines | Write asynchronous tasks (e.g., HTTP requests, delayed actions) without callback hell. | | Immutability | val over var encourages thread-safe, predictable code. | Setting Up a Kotlin Fabric Project Fabric does not natively support Kotlin, but the community maintains Fabric Language Kotlin (FabricLKotlin) . Think of it as the Kotlin runtime for Fabric. Step 1: Use the Template The easiest way is to use the official template: