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.
You can call the private constructor from the public constructor. Another version of the same thingIt is possible to use a private constructor from within the class. In an abstract class, that is probably only useful if called from a non-private constructor. Agreed, it is not something you will want at all frequently.