Windows ---------------------------------------------------- Choose your binary build - x64 or x86 (based on which version of the JVM you are installing to) NOTE: You MUST match your architecture. You can't install the i386 version on a 64-bit version of the JDK and vice-versa. For a JDK installation: Copy RXTXcomm.jar ---> \jre\lib\ext Copy rxtxSerial.dll ---> \jre\bin Copy rxtxParallel.dll ---> \jre\bin Linux ---------------------------------------------------- Choose your binary build - x86_64 or i386 (based on which version of the JVM you are installing to) NOTE: You MUST match your architecture. You can't install the i386 version on a 64-bit version of the JDK and vice-versa. For a JDK installation on architecture=i386 Copy RXTXcomm.jar ---> /jre/lib/ext Copy librxtxSerial.so ---> /jre/lib/i386/ Copy librxtxParallel.so ---> /jre/lib/i386/ NOTE: For a JDK installation on architecture=x86_64, just change the i386 to x86_64 above.