any of you guys use Java Native Interface before? i need to code a buncha classes in C++, but the gui is in Swing, so i need to use JNI. is it doable for the java to manipulate the C++ classes? (all i''ve seen is c++ methods manipulating java members, but i need it the other way around) a2k

You cannot effect C++ methods directly, but have to do so indirectly.

You will have to make a method in Java declared native and then in C++ implement this method. The method in C++ should then call the C++ class member.

All this is pretty detailed explained in the report I wrote. There is a recent posting in this forum about it.

Jacob Marner