Block in front of Player

private static final BlockFace[] axis = { BlockFace.NORTH, BlockFace.EAST, BlockFace.SOUTH, BlockFace.WEST };

public BlockFace yawToFace(float yaw) {
    return axis[Math.round(yaw / 90f) & 0x3].getOppositeFace();
}

public Block frontBlock(Player p) {
  BlockFace face = yawToFace(p.getLocation().getYaw());
  Block b = p.getLocation().getBlock();
  return b.getRelative(face);
}