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ÀýÈç³ÌÐòtestdll.java£¬ÄÚÈÝΪ£º   
  public   class   testdll  {   
  static{   
  System.loadLibrary("testdll");   
  }   
  public   native   static   int   get();   
  public   native   static   void   set(int   i);   
  public   static   void   main(String[]   args)    {  
     testdll   test   =   new   testdll();   
     test.set(10);   
     System.out.println(test.get());   
   }      
  }  
ÓÃjavac   testdll.java±àÒëËü£¬»áÉú³Étestdll.class¡£
ÔÙÓÃjavah   testdll£¬Ôò»áÔÚµ±Ç°Ä¿Â¼ÏÂÉú³Étestdll.hÎļþ£¬Õâ¸öÎļþÐèÒª±»C/C++³ÌÐòµ÷ÓÃÀ´Éú³ÉËùÐèµÄ¿âÎļþ¡£
Step 2:
¸ù¾Ýtestdll.hдC++Îļþtestdll.cpp
testdll.cppÄÚÈÝΪ£º
#include   "testdll.h"   
  int   i   =   0;   
  JNIEXPORT   jint   JNICALL   Java_testdll_get   (JNIEnv   *,   jclass)     {   
      return   2*i;   
  }   
  JNIEXPORT   void   JNICALL   Java_testdll_set   (JNIEnv   *,   jclass,   jint   j)   {   
  i   =   j;   
  }  
Step 3:
Éú³Étestdll.dll
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