Random item.

Hey, i am making a loot block that on right click gets removed and spawns a random item with a probability.

this is what i have so far:

    @Override
    public boolean onBlockActivated(World worldIn, BlockPos pos, IBlockState state, EntityPlayer playerIn, EnumHand hand, EnumFacing facing, float hitX, float hitY, float hitZ) {
    	
    	
        EntityItem item = new EntityItem(worldIn, pos.getX(), pos.getY(), pos.getZ(), new ItemStack(ModTools.hardenedsharpstick, 1));
        worldIn.spawnEntity(item);
    	worldIn.destroyBlock(pos, false);
    	return true;
    }
}

i want to replace the modtools.hardenedsharpstick with a random item from a list, i tried to make a arraylist but i dont know how to make this for items.