Kotlin For Fabric File

player?.world?.setBlockState(pos, state) // Safe call chain If player or world is null, nothing happens. No crash. Add a helper to check if a block is exposed to sky:

Clone the template and replace println("Hello World!") with player.sendMessage() .

@Serializable data class EnergyComponent(var amount: Int, val max: Int) // Instantiate val battery = EnergyComponent(100, 500) val copy = battery.copy(amount = 200) // Immutable copy with change Need to run code after 5 seconds without blocking the game thread?

// Usage if (world.isSkyExposed(pos)) ... Define a custom component for your mod’s energy system:

“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.

"entrypoints": "main": [ "adapter": "kotlin", "value": "com.yourname.awesome.mod.ExampleModKt" ] , "depends": "fabric-language-kotlin": ">=1.10.0"

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