Tons of errors in imported project. Can't see the libraries?

[FakeRabbit]

Hello there!

I'm new to java and I've been requested to do some work on a big java project which is already in development.
After I downloaded it from svn to my eclipse, I get like 4000 errors, all of which like this:
"******** cannot be resolved to a type"
When I look at the imports section of each file, the "org.eclipse.core" part is underlined and there's an error like this:
"The import org.eclipse.core cannot be resolved"
The same thing goes for org.eclipse.swt, org.eclipse.jface and org.osgi which, as I understand, are the core libs and should be accessible as they are.

My guess is there's something wrong with java build path but I can't figure out what :(

Any help would be appreciated

[Tolls]

Does the project work with some form of dependency management tool (eg Maven)?
If so then you need to refresh the libraries.

[FakeRabbit]

Thanks, that was it :) My problem was that in order to import my project from svn, I installed only those parts of Collaboration group that had anything to do with svn. Now that I installed the rest (including maven), everything works fine.