Iterator

class MyIterator implements Iterator<BlockPos> {
  int xSize,ySize,zSize;
  int x,y,z;
  BlockPos pos[xSize][ySize][zSize];
  private findNext() {
    z++;
    if (z == zSize) {
      z = 0;
      y++;
    }
    if (y == ySize) {
      y = 0;
      x++;
    }
  }
  public BlockPos next() {
    BlockPos ret = pos[x][y][z];
    findNext();
    return ret;
  }
  public bool hasNext() {
    return x < xSize;
  }
  public void remove() {
  }