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Hello.java
=============================================
package test;
public class Hello
{
  static
  {
    try
    {
      //´Ë´¦¼´Îª±¾µØ·½·¨ËùÔÚÁ´½Ó¿âÃû
      System.loadLibrary("libhello");
    }
    catch(UnsatisfiedLinkError e)
    {
      System.err.println( "Cannot load hello library:\n " + e.toString() );
    }
  }
  public Hello()
  {
  }
   //ÉùÃ÷µÄ±¾µØ·½·¨
    public native void SayHello(String strName);
}
=======================================================
ToSay.java
package test;
public class ToSay {
public static void main(String args[]){
        Hello hw = new Hello();
        hw.SayHello("Christmas
");   
    }
}
=======================================================
¶þ¡¢¸ù¾ÝJavaÔ´ÎļþÉú³É.hÍ·Îļþ
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javacÉú³ÉHello.class
javac Hello.java
javah test.HelloÉú³Étest_Hello.h->Hello.h
javah test.Hello
=======================================================
Èý¡¢±à¼­C/C++Îļþ
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Hello.c
#include "Hello.h"
#include <stdio.h>
//ÓëHello.hÖк¯ÊýÉùÃ÷Ïàͬ
JNIEXPORT void JNICALL Java_test_Hello_SayHello
(JNIEnv * env, jobject arg, jstring instring)
{
   //´Óinstring×Ö·û´®È¡µÃÖ¸Ïò×Ö·û´®UTF±àÂëµÄÖ¸Õë
const jbyte *str = (const jbyte *)env->GetStringUTFChars( instring, JNI_FALSE );
    printf("Hello,%s\n",str);
  //֪ͨÐéÄâ»ú±¾µØ´úÂë²»ÔÙÐèҪͨ¹ýstr·ÃÎÊJava×Ö·û´®¡£
    env->ReleaseStringUTFChars( instring, (const char


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