creating jni binders

1. create the java stub

package example.jni;
public class HelloWorld {
        private static native void writeHelloWorldToStdout();
        public static void main(String[] args) {
                System.loadLibrary("HelloWorld");
                writeHelloWorldToStdout();
        }
}

2.compile java class

javac example/jni/HelloWorld.java

3.create the header

javah -classpath c:/clay/projects/jnitest/src/java -o HelloWorld.h example.jni.HelloWorld

4. compile the c dll

gcc -mno-cygwin -I"/cygdrive/c/Program Files/Java/jdk1.5.0_08/include" -I"/cygdrive/c/Program Files/Java/jdk1.5.0_08/include/win32" -Wl,--add-stdcall-alias -shared -o ../../dll/HelloWorld.dll HelloWorld.c

5. run it

C:\clay\projects\jnitest\src\java>java -Djava.library.path=C:\clay\projects\jnitest\dll\ example.jni.HelloWorld

"Hello World!"