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.
But make sure you call that method on the parent file. If you call it on your current File object then you will create a folder with that name, and you can't create a file with the same name again until you remove the folder.