This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
I have java class which I want to use in other system (for example delphi). I would like to use class as COM or DCOM object. This will allow using it in any windows application. I have found a lot of bridges, but they allow access to com/dcom objects from java. Not to java classes as COM.
You certainly can call Java from other languages. However, because Java code is not native code, you can't call it directly. You have to invoke a JVM then ask it to run Java code. You want the Invocation API, which is part of Java Native Interface (JNI).
There may be ready-made products to help you to do this, and to make your Java classes look like DCOM objects, but I don't know of these, since I wouldn't want to do any DCOM.
Betty Rubble? Well, I would go with Betty... but I'd be thinking of Wilma.