The JNI (Java Native Interface) is a framework that provides a bridge between Java and native applications. Java applications can define native methods which are implemented in dynamic library written in other languages such as C or C++. The dynamic library is able to call both static and dynamic methods. More information about JNI can be found on Wiki or in tutorial Beginning JNI with NetBeans (for Linux).
The problem is that for loading such a dynamic library you have to call method System.load(String filename) which requires an absolute filename. This approach is just fine if you have dynamic library outside the application’s JAR archive, but when bundling dynamic library within the JAR it is necessary to extract the library into filesystem before loading it. And that’s exactly what my code does.
