This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
L in front of a class name usually indicates an array of that type. Are you trying to add multiple body parts at once? Because there are only two addBodyPart methods; one takes a BodyPart, and the other a BodyPart and an integer.