Javax.comm API on 64-bit Windows
This is how I got it to work. I’ve tested it using JDK 1.6 (32bit) on my Windows 7 64bit machine. Install 32bit JDK. Copy ‘win32com.dll’ to JDK_HOME\jre\bin. Copy ‘javax.comm.properties’to to JDK_HOME\jre\lib. Copy ‘comm.jar’to to JDK_HOME\jre\lib\ext. Now run your program and it should work.