Netbeans 3.5.1: Can not import a jar file

I am a newcomer, using Netbeans 3.5.1 for research purpose. I am supposed to compile two packages which can be found at

1) http://people.cs.uct.ac.za/~evoges/web/GiST.zip
2) http://people.cs.uct.ac.za/~evoges/web/BT.zip

I can successfully compile the first one, but failed to compile the later.

Netbeans reports an error message: BTroutines.java [6:1] package GiST does not exist

I have tried all my best to mount/install the specific GiST jar which is from 1). However, it still does not compile. Interestingly, I can compile 2) by using command line.

Solutions are in highly appreciation.
verveshenAsked:
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CEHJCommented:
Don't know NetBeans, but you could

1. Do the first one
2. Import the package created by the first
3. Do the second
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verveshenAuthor Commented:
Yes, I did. However, it does NOT work in netbeans while runs smoothly in dos console.
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CEHJCommented:
Well you'll have to read the manual then ;-)
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savalouCommented:
Since you've given very little information on what exact steps you took, I'm going to spell it all out.  

You need to look in the Java files for the package directive.  If it says
package x.y.z;

then the java file should be in directory WORKDIR/x/y/z.  In Netbeans, mount the directory WORKDIR and then right-click on it and choose "Add to project."  Then you can go to the project view and build/compile your files.  If you make a jar of the class files, it is important to keep the directory structure.  You can then mount the JAR as an archive in Netbeans and it's added to your development classpath.  
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savalouCommented:
NetBeans asks that you respect the packaging rules of Java.  You could have all your java files in a single directory irrespective of their packaging and do a javac at the command line on them and it will compile.  But  you can't use the classes like that, the classloader will want them to be in directories.  
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