I am trying to figure out where the classpath gets set. I am trying to compile a simple Java class that has some includes from a jar file. I first tried echo $CLASSPATH to see what it currently was set to, but it said undefined variable. I thought that was odd because I could compile other java classes that have includes (from the standard java packages) in them. Also, Java apps seem to compile and run ok, so the classpath must be set somewhere. The closest thing I have found so far was in a plist file. In JavaConfig.plist it appears to set the default classpath, but changing it has no effect on compiling (tried rebooting). I noticed some of the paths set in it start with $NEXT_ROOT. Doing an echo $NEXT_ROOT also shows that the variable is undefined. So I am thinking that this file is not being used. So my question is....if my Java works from the command line, I must have a valid classpath, but where is it set and how do I change it? I also tried setting it in my .profile but that didn't seem to have any effect either.

[bashyal]

The default java CLASSPATH is known by the compiler. They reside in the java.framework directory. If you want to add to the classpath when you run your app, you could do
java -cp myApp.jar myApp
This would apeend myApp.jar to the classpath. If you want to append more you could separte each dir/jar by using :

[bashyal]

The JDK classes are in:
/System/Library/Frameworks/JavaVM.framework/Versions/1.2

but as I mentioned earlier, this is classpathed in by default.

Thanks. I guess I better go get a book on Java2 as it looks like some things have changed since my 1.1 days ;-) I'll give the javac -cp a try and see if it works. Can I still add to my classpath in my .profile like I used to do in 1.1? Or is the $CLASSPATH env variable not used anymore? Was just wondering how to add things to my classpath in a more permanent fashion.

Thanks for the replies

[bashyal]

Yes, you can still use CLASSPATH env variable. Just set your classpath to whatever you want as follows:

setenv CLASSPATH /Users/username/myclasspath/

so when you use java it will look in there in addition to the default classpath.