This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
A nice collection of questions, Krishna, thanks. I tried them all myself, compiling and running them in the BlueJ learning IDE. There are a lot of suprises with autoboxing which make one very wary of utilizing it unless it is being used in a very straightforward way.