Basic Questions about Classpath

[Rhino]

I am trying to help my friend Ron with a problem we were having on his Windows 2000 machine yesterday. He has already posted about it but I just want to review the basic concept in case I'm missing something conceptual. These questions refer to Ant 1.6.1. Am I right in assuming that a <java> task that does not contain a classpath attribute will use the value of the system property java.class.path, which is derived from the CLASSPATH environment variable currently in effect? Will this be true for both <java> tasks that are executing .class files and <java> tasks that are executing jar files? Am I right that a <java> task which *does* contain a classpath attribute will use only the classpath specified in the attribute and ignore any classpath set in the CLASSPATH environment variable? I am trying to understand why a <java> task that I wrote works fine on XP without any classpath attribute yet doesn't work on Windows 2000, regardless of whether I use a classpath attribute or not. On both platforms, the CLASSPATH environment variable includes the jar file the program needs to see in order to execute correctly.   Rhino --- rhino1 AT sympatico DOT ca "There are two ways of constructing a software design. One way is to make it so simple that there are obviously no deficiencies. And the other way is to make it so complicated that there are no obvious deficiencies." - C.A.R. Hoare