Kotlin For Fabric Online

if (player != null && player.getWorld() != null) player.getWorld().setBlockState(pos, state);

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

@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? if (player

plugins id("fabric-loom") version "1.5-SNAPSHOT" id("org.jetbrains.kotlin.jvm") version "1.9.0" Kotlin compiles to the same bytecode as Java

“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.

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

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.