How to call c++ code from java

i have a third party dll written in c++. I want to call its methods in java. I searched web and found that I have to use JNI for this. I have seen examples on web writing c++ code and then using it from java through JNI, but can anybody please point to me the example where i have a predefined library or dll in c++ and i have to call it in java. I think that I may have to declare methods in library as native in java and then write a wrapper implementation (dll) in c++ which actually calls the library or dll functions. But, then how will I call methods of dll from my wrapper code.
Any examples, please point
Regards,
Farooq

There's a JNI forum here that may be a better place for this question; though given the general nature of the question, I suspect that they'll refer you to a tutorial. good luck.

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How to Call C++ Method from Java

I need to call C++ method from Java.
I have gone through the JNI tuorial , but was not able to pin point things.
I read that :
You have to write JNI c functions which then call your C++ member functions.You need to write a JNI function which will call new on your C++ class.
Now i have java class :
Java Code JavaClass.java ---->
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public native void nativeMethod();
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class NativeCppCode
public:
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private:
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I need to call C++ method from Java.Not possible.
JNI uses C methods.
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Common idiom for the pointer in the above is to pass it back and forth to your java code as a java long. You cast it it and from your class pointer. Provide an explicit java method to free it when done. Besides providing the explicit method also implement a finalizer to free it as well (however that is a fail safe and should not be relied upon.)

Calling c code from java

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I have question
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