POWERED 
GiovynetSerialPort is an easy to use, open source libraries for working  with  serial port RS-232  on the java platform using the Java Native Interface, with suport to Windows and Linux.
Features for this version 1.3
  • Compatibility with java 5 and java 6.
  • Compatibility with Windows and Linux.
  • Improve methods for sending and receiving data hex and integer type.
  • Javadoc update.
  • Flow control by software.
  • Compatybility with usb to serial converter devices.
Quick Start Guide
  1. Download and unzip GiovynetSerialPort  Help.
  2. Create Java Application Project.  Help to NetBeans | Help to Eclipse.
  3. Create library with SerialPort.jar and javadoc.  Help to NetBeans | Help to Eclipse.
  4. Add library to project. Help to NetBeans | Help to Eclipse.
  5. Add dynamic link libraries to folder project. Help to NetBeans | Help to Eclipse.
  6. Create class main and copy the fallowing code. Help to NetBeans | Help to Eclipse.
  7. Build and run the project. Help to NetBeans | Help to Eclipse.
  8. See use references. How To Use
Download

GiovynetSerialPort   Libraries   DOWNLOAD
GiovynetSerialPort   Sources: http://giovynetserialport.googlecode.com/svn/trunk/