Subclipse includes a feature on its update site that provides the native Windows DLL's for JavaHL. This "just works" so it is the recommended way to get JavaHL on Windows. However, if for some reason you want to use another binary you can. There are two things you need to do:

1. Do NOT install the above feature. If this is installed it will take precedence.
2. Make sure the folder with the DLL's you want to use is available on PATH when you start Eclipse

There is version checking done on the Java side to make sure the native library that is loaded is a compatible version. So, for example, if Subversion 1.10 is out in Beta and you want to try it, you will not be able to do so without modifying the JavaHL java code because it has checks that it loads a version 1.9.x library. However, if a newer 1.9.x version is available then that should work fine.

Likewise, maybe you need a version built with special compile options that the binaries we provide do not have. In that case, as long as you provide the right SVN version they should also work fine.