This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
There is another class ConstructorTry in package B
the line marked will give an error that there is no constructor in Constructor try that takes a String. If the constructor of A.ConstructorTry was inherited then the line would have compiled as A.ConstructorTry has a constructor which takes a String and B.ConstructorTry is a sub-class of A.ConstructorTry.