BlockLoc

class BlockLoc
{
  int x;
  int y;
  int z;

  public BlockLoc(int x, int y, int z)
  {
    this.x = x;
    this.y = y;
    this.z = z;
  }

  public boolean equals(Object object)
  {
    if (!(object instanceof BlockLoc)) return false;

    BlockLoc block = (BlockLoc)object;
    return (this.x == block.x) && (this.y == block.y) && (this.z == block.z);
  }

  public int hashCode()
  {
    return Integer.valueOf(this.x).hashCode() >> 13 ^ Integer.valueOf(this.y).hashCode() >> 7 ^ Integer.valueOf(this.z).hashCode();
  }
}