Java Native Interface)

 

To put it bluntly, Java calls the library file DLL (Windows)/SO (UNIX) compiled by C/C ++)

1. Public class testdll
2. {
3. Static
4. {
5. System. loadlibrary ("Goodluck ");
6. }
8. Public native static int get ();
9. Public native static int set (int );
11. Public static void main (string [] ARGs)
12. {
13. Testdll test = new testdll ();
14. Test. Set (10 );
15. System. Out. println (test. Get ());
16. }
17. }

Use javac testdll.JavaCompile it to generate testdll. Class.

Then use javah testdll to generate the testdll. h file in the current directory. This file needs to be called by the C/C ++ program to generate the required library file.

Use JNI. h under testdll. h and include/as the header file to implement

Jniexport jint jnicallJava_ Testdll_get (jnienv *, jclass); and
Jniexport void jnicallJava_ Testdll_set (jnienv *, jclass, jint );

Generate the Goodluck. dll file. OK.