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.
Hardware interfacing will require that you connect your java code to hardware specific code written in some other language using JNI. For communicating with serial and parallel ports you can use the COMM API that includes hardware specific routines for some architectures. Bill