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.
No it is the recommended behaviour according to the JDBC specification ie documented rather than actual behaviour.
People have gotten it wrong before, it is safer to lose the ResultSet explicitly (in my opinion)