IO without APIs

[KAJLogic]

I was wondering if anyone knew of a tutorial for accessing windows/mac OS files with java (without java's IO API).

[Norm]

without java's IO API

The java packages are how you write java code to read/write files.
Can you explain what you are trying to do?

[KAJLogic]

I would like to implement my own communication with the JNI to get Windows information.

[andbin]

I would like to implement my own communication with the JNI to get Windows information.

The use of JNI is a rather "advanced" and not easy concept. You need to know the concepts on JNI, you need to know C/C++ language, you need a C/C++ compiler (to develop a shared dinamic library appropriate for JNI) and you must be quite well versed on the native O.S. APIs (on Windows, the Win32 API, on MacOSX I don't know).
Alternatively there is the JNA (Java Native Access, search on the web) library that is "bridge" between Java and any native library. You don't need C/C++ but you still need to know the O.S. APIs.

Do you have these knowledges?

[KAJLogic]

The use of JNI is a rather "advanced" and not easy concept. You need to know the concepts on JNI, you need to know C/C++ language, you need a C/C++ compiler (to develop a shared dinamic library appropriate for JNI) and you must be quite well versed on the native O.S. APIs (on Windows, the Win32 API, on MacOSX I don't know).
Alternatively there is the JNA (Java Native Access, search on the web) library that is "bridge" between Java and any native library. You don't need C/C++ but you still need to know the O.S. APIs.

Do you have these knowledges?

I will indulge you in the hopes this is leading somewhere productive. I am familiar with C/C++ (I have a compiler), and I have no knowledge of O.S APIs, but like any other API I assume knowledge of the language is the only necessity in understanding it.