Query regarding using JNI in linux

Hi
I have a query regarding JNI.We have a situation in which
we have some c programmes and we want to call that c programme method in my java code. The problem is that in JNI the native code signature should match the signature of the method of the header file generated by javah. We donot want to change the signature of the native code since it is hard to debug.So please suggest me a way out that i can call the native method without changing the signature of the native code.Please if u could give me some few simple example
Thanking u

So please suggest me a way out that i can call the native method without changing the signature of the native code.You write a wrapper. Your java JNI class has methods. Those methods are written in C by you. Those methods are new code. Those methods call your existing C methods.
Please if u could give me some few simple example.http://java.sun.com/docs/books/tutorial/native1.1/index.html

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