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 has the reflection API, which allows a running JVM to ask about the classes it contains, and about their methods and their fields. If you ask the reflection API what type a void method returns, it will return the static field Void.TYPE . That is the only purpose of the Void class.