Java™ Native Interface: Programmer’s Guide and Specification, The

Chapter 2. Getting Started

This chapter walks you through a simple example of using the Java Native Interface. We will write a Java application that calls a C function to print “ Hello World! ”.

Overview

Figure 2.1 illustrates the process for using JDK or Java 2 SDK releases to write a simple Java application that calls a C function to print “ Hello World! ”. The process consists of the following steps:

Figure 2.1. Steps in Writing and Running the “Hello World” Program

1. Create a class (HelloWorld.java) that declares the native method.

2. Use javac to compile the HelloWorld source file, resulting in the class file HelloWorld.class. The javac compiler is supplied ...