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Java Native Interface ÈëÃÅʾÀý

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public class Hello{
        static{
                System.loadLibrary("Hello");
        }
        public Hello(){
        }
        public native void sayHello(String strName);
        public static void main(String[] args){
                Hello hello = new Hello();
                hello.sayHello("fuye");
        }
}
µÚ¶þ²½£º±àÒë
javac Hello.java
µÚÈý²¿£ºÉú³ÉC++ÎļþÍ·
javah Hello
Hello.hÎļþÄÚÈÝÈçÏ£º
/* DO NOT EDIT THIS FILE - it is machine generated */
#include <jni.h>
/* Header for class Hello */
#ifndef _Included_Hello
#define _Included_Hello
#ifdef __cplusplus
extern "C" {
#endif
/*
 * Class:     Hello
 * Method:    sayHello
 * Signature: (Ljava/lang/String;)V
 */
JNIEXPORT void JNICALL Java_Hello_sayHello
  (JNIEnv *, jobject, jstring);
#ifdef __cplusplus
}
#endif
#endif
µÚËIJ½£ºÐ½¨C++ʵÏÖÎļþ
#include "Hello.h"
#include <stdio.h>
JNIEXPORT void JNICALL Java_Hello_sayHello(JNIEnv * env, jobject arg, jstring instring){
        printf("This is my first jni program\n");
}
µÚÎå²½£º ±àÒ룬Á¬½Ó³É±¾µØ¿â
1¡¢Éú³ÉHello.o
g++ -I /usr/local/dev/java/jdk1.5.0_16/include/ -I /usr/local/dev/java/jdk1.5.0_16/include/linux/ -c Hello.cpp
2¡¢Éú³ÉlibHello.so.1.0
g++ -shared -W1,-soname,libHell


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