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how do i access a class in a library jar file?

Posted on 2008-10-25
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Last Modified: 2013-12-14
I have attached a jar file to my new project. The jar file has a bunch of classes in the default package. So, the one i want to instatiate is named AgentImpl.

When i go to create an AgentImpl agent = new AgentImpl(); it does not see the class.

How do i access these classes inside of the jar file.

I can see the jar file under my libraries in netbeans, so i attached it correctly.

thanks
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Question by:alexmac05
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Accepted Solution

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Kevin Cross earned 2000 total points
ID: 22805732
I believe the problem is the fact that the classes are in the default package.  If the JAR is your own from another project, name the package and see how that works.  If not, I will try to find how as I haven't had to work around this much as usually JAR's have package names for public interface/classes that I have worked with.
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Author Comment

by:alexmac05
ID: 22805742
It is my own so I will try to name the package and see if that works. I'll let you know shortly.

Thanks!

alex
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Author Comment

by:alexmac05
ID: 22805782
OK.

I have three projects total in netbeans. The first two need to see each other via package and the third needs to interact with a jar file from EDMS_Agent.

1) EDMS_Agent
all classes are now in package agentpackage

2) ElectionLibrary
all classes are now in package electionpackage

How do I import the packages to the different projects?

I did create a jar file of the EDMS_Agent but now that I changed the package of that jar I can not build it because the ElectionLibrary (which needs to see some classes in EDMS_Agent and visa versa) - they can't see each other so I can't build them. So, i need to get those two packages seeing each other so that I can rebuild the jar to attach it to my third project named ManagementStudioApplication.
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Author Comment

by:alexmac05
ID: 22805814
How do I access code from project to project in netbeans?

Does a project need a jar file in order to see classes from another project?

If you know the answer then please let me know.

Otherwise, I was able to move the code from ElectionLibrary into EDMS_Agent and then put it all under one project and then create the jar file and then it worked.

THANKS!!!!

alex

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Author Closing Comment

by:alexmac05
ID: 31510026
Just wondering - in netbeans if I want classes in one project to access classes in another project - does it have to be through a jar file?  I can't access the namespace through importing the package?
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Expert Comment

by:Kevin Cross
ID: 22805847
If you right-click on the project and select properties, you can click on Libraries (same place you would add JAR) and click on the Add Project button.  This will let you build your current project with visibility to the classes in the other project(s).

Hope that helps.
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LVL 60

Expert Comment

by:Kevin Cross
ID: 22805850
Once the projects are linked in the classpath, you import them like you would normally.

import electionpackage.*;
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Author Comment

by:alexmac05
ID: 22807816
yes, thank you
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