Java Native Access in JDK 1.3

I'm trying to integrate JNA into JDK 1.3 application. JNA pages have following on this subject:

Supported on 1.4 or later JVMs (earlier VMs may work with stubbed NIO support)

I've managed to port JNA sources to JDK 1.3 by dropping all java.nio references. I do not need for example java.nio.Buffer.

However, JNA DLLs are compiled开发者_开发知识库 to use Java NIO types and complain accodingly:

JNA: Problems loading core IDs: java.nio.Buffer

What do I need to do to make JNA work in JDK 1.3? What does this "may work with stubbed NIO support" mean?

Is my only option to stub NIO from C source code and recompile DLL? Since I'm not good at C programming at all, I'm desperately trying to avoid it.

Is there some other way to call native DLL in Java (not JNI, called DLL's are closed source and JNI incompatible).

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The docs are proposing that you write some fake java.nio classes, and put them on the bootclasspath -- and then don't use anything that requires java.nio. You're not expected to modify the JNA source or edit the native code.

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JDK 1.3? That's ridiculously out of support, unless you're running on Solaris 8. EOL started seven years ago and was complete when JDK 6 became available on 6-Nov-2006. That's almost five years back.

Personally, I think your efforts would be better spent porting the code to a more modern JDK. JNA is telling you that it requires NIO. I'd heed the call and port away from JDK 1.3.