HI Guys!

 

I have a block but when I click it the message appears two times. Why? Here's the code:

package com.herobone.allergy.blocks;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Random;

import com.herobone.allergy.capability.AllergyProvider;
import com.herobone.allergy.capability.IAllergy;
import com.herobone.allergy.registry.BlockRegistry;
import net.minecraft.block.Block;
import net.minecraft.block.BlockHorizontal;
import net.minecraft.block.SoundType;
import net.minecraft.block.material.Material;
import net.minecraft.block.properties.IProperty;
import net.minecraft.block.properties.PropertyDirection;
import net.minecraft.block.state.BlockStateContainer;
import net.minecraft.block.state.IBlockState;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.util.EnumBlockRenderType;
import net.minecraft.util.EnumFacing;
import net.minecraft.util.EnumHand;
import net.minecraft.util.Mirror;
import net.minecraft.util.Rotation;
import net.minecraft.util.math.BlockPos;
import net.minecraft.util.text.TextComponentString;
import net.minecraft.world.World;

public class Microscope extends Block {
	
	public static final PropertyDirection FACING = BlockHorizontal.FACING;

	public Microscope() {
		super(Material.ROCK);
		this.blockHardness = 2F;
		this.blockResistance = 5F;
		this.setSoundType(SoundType.METAL);
		this.setLightLevel(0.2F);
		this.setHarvestLevel("pickaxe", 1);
	}

	@Override
	public boolean isOpaqueCube(IBlockState state) {
		return false;
	}
	
	@Override
	public Item getItemDropped(IBlockState state, Random rand, int fortune) {
		return Item.getItemFromBlock(BlockRegistry.microscope);
	}
	
	@Override
	public void onBlockAdded(World worldIn, BlockPos pos, IBlockState state)
    {
        this.setDefaultFacing(worldIn, pos, state);
    }
	
	@Override
	public boolean onBlockActivated(World worldIn, BlockPos pos, IBlockState state, EntityPlayer player, EnumHand hand, ItemStack heldItem, EnumFacing side, float hitX, float hitY, float hitZ) {
		
		IAllergy allergy = player.getCapability(AllergyProvider.ALLERGY_CAP, null);
		
		String in = allergy.get();
		
		if (in != null) {
			List<String> allergyList = new ArrayList<>(Arrays.asList(allergy.get().split(" "))); //Do the ArrayList from the StringBuilder-String
			
			StringBuilder allergies = new StringBuilder();
			
			for(int i = 0; i < allergyList.size(); i++) {
				String s = allergyList.get(i);
				if(s != null) {
					allergies.append(s + " ");
				}
			}
			
			player.addChatComponentMessage(new TextComponentString("Your allergies are: " + allergies.toString())); //Directly from StringBuilder
			return true;
		}
		
		return false;
	}

    private void setDefaultFacing(World worldIn, BlockPos pos, IBlockState state)
    {
        if (!worldIn.isRemote)
        {
            IBlockState iblockstate = worldIn.getBlockState(pos.north());
            IBlockState iblockstate1 = worldIn.getBlockState(pos.south());
            IBlockState iblockstate2 = worldIn.getBlockState(pos.west());
            IBlockState iblockstate3 = worldIn.getBlockState(pos.east());
            EnumFacing enumfacing = (EnumFacing)state.getValue(FACING);

            if (enumfacing == EnumFacing.NORTH && iblockstate.isFullBlock() && !iblockstate1.isFullBlock())
            {
                enumfacing = EnumFacing.SOUTH;
            }
            else if (enumfacing == EnumFacing.SOUTH && iblockstate1.isFullBlock() && !iblockstate.isFullBlock())
            {
                enumfacing = EnumFacing.NORTH;
            }
            else if (enumfacing == EnumFacing.WEST && iblockstate2.isFullBlock() && !iblockstate3.isFullBlock())
            {
                enumfacing = EnumFacing.EAST;
            }
            else if (enumfacing == EnumFacing.EAST && iblockstate3.isFullBlock() && !iblockstate2.isFullBlock())
            {
                enumfacing = EnumFacing.WEST;
            }

            worldIn.setBlockState(pos, state.withProperty(FACING, enumfacing), 2);
        }
    }
    
    public EnumBlockRenderType getRenderType(IBlockState state)
    {
        return EnumBlockRenderType.MODEL;
    }

    /**
     * Convert the given metadata into a BlockState for this Block
     */
    public IBlockState getStateFromMeta(int meta)
    {
        EnumFacing enumfacing = EnumFacing.getFront(meta);

        if (enumfacing.getAxis() == EnumFacing.Axis.Y)
        {
            enumfacing = EnumFacing.NORTH;
        }

        return this.getDefaultState().withProperty(FACING, enumfacing);
    }

    /**
     * Convert the BlockState into the correct metadata value
     */
    public int getMetaFromState(IBlockState state)
    {
        return ((EnumFacing)state.getValue(FACING)).getIndex();
    }

    /**
     * Returns the blockstate with the given rotation from the passed blockstate. If inapplicable, returns the passed
     * blockstate.
     */
    public IBlockState withRotation(IBlockState state, Rotation rot)
    {
        return state.withProperty(FACING, rot.rotate((EnumFacing)state.getValue(FACING)));
    }

    /**
     * Returns the blockstate with the given mirror of the passed blockstate. If inapplicable, returns the passed
     * blockstate.
     */
    public IBlockState withMirror(IBlockState state, Mirror mirrorIn)
    {
        return state.withRotation(mirrorIn.toRotation((EnumFacing)state.getValue(FACING)));
    }

    protected BlockStateContainer createBlockState()
    {
        return new BlockStateContainer(this, new IProperty[] {FACING});
    }
    
    /**
     * Called by ItemBlocks just before a block is actually set in the world, to allow for adjustments to the
     * IBlockstate
     */
    public IBlockState onBlockPlaced(World worldIn, BlockPos pos, EnumFacing facing, float hitX, float hitY, float hitZ, int meta, EntityLivingBase placer)
    {
        return this.getDefaultState().withProperty(FACING, placer.getHorizontalFacing().getOpposite());
    }

    /**
     * Called by ItemBlocks after a block is set in the world, to allow post-place logic
     */
    public void onBlockPlacedBy(World worldIn, BlockPos pos, IBlockState state, EntityLivingBase placer, ItemStack stack)
    {
        worldIn.setBlockState(pos, state.withProperty(FACING, placer.getHorizontalFacing().getOpposite()), 2);
    }

}

 

 

Thaaank's 

Herobone

Ok, and wich is besser for this?

Works perfectly but if you have an item in the hand it doesn't work. Why that?