Installing RXTX for Serial Communication with Java in MS platform.

01- Get RXTX from here.

• Filename: rxtx-2.1-7-bins-r2.zip
• Link: https://www.dropbox.com/s/gt061ayzxe4kaoi/rxtx-2.1-7-bins-r2.zip

02- Unzip that file, then you will see 3 files on following each path.

Path1: rxtx-2.1-7-bins-r2/Windows/i368-mingw32/

• rxtxParallel.dll 
• rxtxSerial.dll

Path2: rxtx-2.1-7-bins-r2/

• RXTXComm.jar

03- Copy there

2 files rxtxParallel.dll & rxtxSerial.dll to [ C:\Program Files\Java\jdk1.7.0_45\jre\bin ]

1 file RXTXComm.jar to [ C:\Program Files\Java\jdk1.7.0_45\jre\lib\ext\ ]