How to access vc dll with java

Question

I need to access vc dll with java. Now I only have *.h,*.lib, *.dll,no *.cpp,because the dll is from others. I cann't modify the *.cpp files for java. so what should I do .
Best wishes.

Answer 1

Create a JNI wrapper for rhe dll:
1)Create a java class that defines methods that correspond to the methds in the c++ dll
2)compile this, and compile it with the jni compiler to get the c++ header files.
3)Create a C++ file that implements the methods defined in the header file, calling the c++ code as necesssary and using the JNI helpess to translate parameters from java form to C++ from.
4)Perform any initialisation of th c++ dll by adding a DllMain() or equivalent under unix/linux
5)create a makefile to build a dll from the above, linking to your import (.lib) library
6)make sure both DLLs are with your java class files when you run the java app.