[Solved]-Exported JAR file doesn't detect serial ports-eclipse

1. copy win32.dll file to c:\programfiles\java\jdk\bin
2. copy comm.jar file to c:\programfiles\java\jdk\lib
3. copy javax.comm properties file to c:\programfiles\java\jdk\lib
4. copy 
win32com.dll  to jre/bin

comm.jar to  jre/lib/ext

java.comm.properties to jre/lib



 note:add all files in step 4 to both jre.  jre dir and jre in jdk folder

this solved my problem