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.
What you are looking for is J2ME. The API for J2ME is quite light and the way in which applications are deployed to phones and the way they are run is also different from the way J2SE works. You can develop applications using the wireless toolkit or WTK as it is popularly known. You can download it from the sun java web site.