Kotlin For Fabric -

The Fabric ecosystem has embraced Kotlin through fabric-language-kotlin , and the setup is painless. If you’re starting a new mod or refactoring an old one, give Kotlin a try. Your future self (and your users) will thank you for the fewer crashes and cleaner code.

“But isn’t Kotlin slower?” – Not meaningfully. Kotlin compiles to the same bytecode as Java. In fact, inline functions and smart casts can produce more optimized bytecode than equivalent Java. kotlin for fabric

Clone the template and replace println("Hello World!") with player.sendMessage() . “But isn’t Kotlin slower

launch delay(5000) // This runs on the main server thread after 5 seconds player.sendMessage(Text.literal("5 seconds have passed!")) Clone the template and replace println("Hello World

| 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:

plugins id("fabric-loom") version "1.5-SNAPSHOT" id("org.jetbrains.kotlin.jvm") version "1.9.0"

dependencies modImplementation("net.fabricmc:fabric-loader:0.14.24") modImplementation("net.fabricmc.fabric-api:fabric-api:0.91.0+1.20.4")