java.lang.UnsatisfiedLinkError: no rxtxSerial in java.library.path in runnable jar

Question

I am having a problem when I try to use my Arduino in my java application when I export it to a runnable jar file. When I run the application on the IDE it runs just fine, the exported jar on the same machine too, but when I run it on a different machine I get a the

java.lang.UnsatisfiedLinkError: no rxtxSerial in java.library.path.

I am sure that I have added the RXTXcomm.jar and the rxtxserial.dll to the build path as shown in the picture below build path

In the other machines where I put my jars, I copy mentioned two files in the exact same location but the error persists.

Have you set the `java.library.path` ? http://stackoverflow.com/questions/661320/how-to-add-native-library-to-java-library-path-with-eclipse-launch-instead-of — Marged, Oct 14 '15 at 19:30
Your jar file needs the RXTXcomm.jar in its classpath at runtime as well... unless you're using something to build an uber jar for it. I believe common Java build systems like Maven and Gradle have plugins to build uber-jars. — Powerlord, Oct 14 '15 at 19:31
Yes, I added the the RXTXcomm.jar and the rxtxserial.dll in the build path, there are a link of an image showing this in my question. — user3382344, Oct 14 '15 at 19:34
@Powerlord thank you I am going to try to build with Maven but I thought the simplest way to achieve this is to always copy past the needed files in the same location of your build path, in my app I have another library (jmf) and it runs on every machine with this method — user3382344, Oct 14 '15 at 19:38

Friwi · Accepted Answer · 2015-10-15T14:02:26.163

0

You have to copy the contents of the RXTXcomm.jar into the exported JAR-File.

Place the dlls into jre_home/bin/ or in your programs main folder.

edited Oct 15 '15 at 14:02

answered Oct 14 '15 at 19:28

Friwi

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The dll file is not inside the jar I just add them in the build path in the native library location – user3382344 Oct 14 '15 at 19:44
This should be correct. Either place the dll in your applications main directory, or place it in jre_home/bin/ – Friwi Oct 14 '15 at 19:45
when I place them in the jre_home/bin/ do I need to specify the build path to go look for them there or it is done automatically without specifying it? – user3382344 Oct 14 '15 at 19:49
placing them in jre_home solved it as you said, thank you. – user3382344 Oct 15 '15 at 14:00

java.lang.UnsatisfiedLinkError: no rxtxSerial in java.library.path in runnable jar

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