JNI stands for Java Native Interface. The Java
Native Interface (JNI) enables the integration of
code written in the Java programming language
with code written in other languages such as C
and C++. It allows programmers to take full
advantage of the Java platform without having to
abandon their investment in legacy code. JNI lets
Java code use code and code libraries written in
other languages, such as C and C++, and allows
you to call Java code from within native code.
The JNI allows writing native methods to handle
situations when an application cannot be written
entirely in the Java programming language e.g.
when the standard Java class library does not
support the platform-specific features or program
library. The JNI framework lets a native method
utilize Java objects in the same way that Java
code uses these objects.