I am trying to implement a block with metadata in scala. Here is my code:

 

[pre]package generic.block

 

import java.util

import scala.collection.JavaConversions._

 

import net.minecraft.block.Block

import net.minecraft.block.material.Material

import net.minecraft.block.properties.{IProperty, PropertyDirection, PropertyInteger}

import net.minecraft.block.state.{BlockState, IBlockState}

import net.minecraft.creativetab.CreativeTabs

import net.minecraft.item.{Item, ItemStack}

import net.minecraft.util.{AxisAlignedBB, BlockPos, EnumFacing, EnumWorldBlockLayer}

import net.minecraft.world.{IBlockAccess, World}

import net.minecraftforge.fml.relauncher.{Side, SideOnly}

 

object BlockIndexful extends Block(Material.cloth) {

 

  // Renders like glass

  // Each pixel is either completely transparent or opaque

  @SideOnly(Side.CLIENT)

  override val getBlockLayer = EnumWorldBlockLayer.CUTOUT

 

  override val isOpaqueCube = false

  override val isFullCube = false

  override def getCollisionBoundingBox(world: World, pos: BlockPos, state: IBlockState): AxisAlignedBB = null

 

  final val propertyFacing = PropertyDirection.create("facing", EnumFacing.Plane.HORIZONTAL)

  final val propertyIndex = PropertyInteger.create("index", 0, 3)

 

  @SideOnly(Side.CLIENT)

  override def getSubBlocks(item: Item, tab: CreativeTabs, list: util.List[itemStack]): Unit = {

    for (i <- 0 to 3)

      list.add(new ItemStack(item, 1, i))

  }

 

  override def getStateFromMeta(meta: Int) = {

val facing = EnumFacing.getHorizontal(meta)

val index = (meta & 0x0c) >> 2

getDefaultState.withProperty(propertyFacing, facing).withProperty(propertyIndex, index)

                // (1)

  }

override def getMetaFromState(state: IBlockState) = {

val facing = state.getValue(propertyFacing)

val index = state.getValue(propertyIndex)

facing.getHorizontalIndex | index << 2

}

override def getActualState(state: IBlockState, world: IBlockAccess, pos: BlockPos) = state

override def createBlockState = {

val properties = Array(

propertyFacing,

propertyIndex)

new BlockState(this, properties)

                // (2)

}

 

}[/pre]

 

 

There seems to be some problems. At (1), The compiler says that

 

[pre]Error:(45, 56) inferred type arguments [Any,Int] do not conform to method withProperty's type parameter bounds [T <: Comparable[T],V <: T]

getDefaultState.withProperty(propertyFacing, facing).withProperty(propertyIndex, index)

                                                    ^[/pre]

 

At (2), it says [pre]Error:(57, 33) type mismatch;

found  : Array[net.minecraft.block.properties.PropertyHelper[_ >: Integer with net.minecraft.util.EnumFacing <: Comparable[_ >: Integer with net.minecraft.util.EnumFacing <: java.io.Serializable] with java.io.Serializable]]

required: net.minecraft.block.properties.IProperty[?0] forSome { type ?0 <: Comparable[?0] }

new BlockStateContainer(this, properties)

                              ^[/pre]

 

These codes are from MinecraftByExamples and work perfectly fine in Java. What should I change to fix the problem? For (2), I have tried casting the elements to type [pre]IProperty[_ <: Comparable[_]][/pre] and to [pre]IProperty[_][/pre], but that did not solve the problem.

 

Are there any examples/tutorials of scala modding? Thanks in advance.

I found the problem. Mysteriously my Java version was set to Java 6 when it should be Java 8. Now all the errors are gone and minecraft runs without problem.