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.
Java doesn't support multiple inheritance because of "Deadly diamond of Death", Interface does support..because we don't implement any thing inside interface..!! you can also refer to following 10 lines article for the same : deadly-diamond-of-death