Java Native Interface

Java^TM Native Interface (JNI) is a standard programming interface for writing Java native methods and embedding the Java^TM virtual machine* into native applications. The primary goal is binary compatibility of native method libraries across all Java virtual machine implementations on a given platform.

JNI 5.0 Specification

Java Native Interface 5.0 Specification

JNI Enhancements

AWT Native Interface

Other Information

The Java Tutorial has a trail on the Java Native Interface: Java Native Interface Tutorial
For JNI FAQs and information about the book The Java Native Interface: Programmer's Guide and Specification, see this document on the Java Software website: Java Native Interface Tips

*As used on this web site, the terms "Java virtual machine" or "JVM" mean a virtual machine for the Java platform.