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.
It's not an error; it's a warning. You can safely ignore it, but it's telling you that there's a better way to do something that you're doing. It's also telling you how to find out more about what specifically the problem is: add "-deprecation" to your "javac" command line, and it will tell you specifically what deprecated API you're overriding.
"Deprecated" basically just means "being replaced by something better."