Edison - Use Google-Gson library with Eclipse (Java)

I'm trying to use the Google-Gson library with my Java project in Eclipse. In order to use the Mraa library I had to add the mraa.jar file, as well as use the following command in my code:

System.loadLibrary("mraajava");

I'm assuming this line is looking for the shared object file libmraajava.so (correct me if I'm wrong), but I can't find anything like that for Google-Gson (files located at http://repo1.maven.org/maven2/com/google/code/gson/gson/2.5/).

I can use the Gson library in just a normal Java project by simply adding the Jar, but with the Edison I get the following error:

Exception in thread "main" java.lang.NoClassDefFoundError: com/google/gson/Gson  at GsonTest.readWriteGson(GsonTest.java:1204)  at GsonTest.main(GsonTest.java:233)
Caused by: java.lang.ClassNotFoundException: com.google.gson.Gson  at java.net.URLClassLoader.findClass(URLClassLoader.java:381)  at java.lang.ClassLoader.loadClass(ClassLoader.java:424)  at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)  at java.lang.ClassLoader.loadClass(ClassLoader.java:357)

I've referenced the Jar as such:

Any help would be greatly appreciated! Thanks!