eclipse - Java: How do I know which jar file to use given a class name?

Question

Given a class, org.eclipse.ui.views.navigator.ResourceNavigator for example, how do I find out which jar file to use? I know it's in org.eclipse.ui.ide, but how would I find that out?

Edit: Thank you to all of you who answered. Like many things, there seems to be several ways to skin this cat. I wish javadoc contained this info. So far here are the different methods:

1. Without Internet, Eclipse or NetBeans:

   for f in `find . -name '*.jar'`;  do echo $f && jar tvf $f | grep -i $1; done
   

2. If you want to find out locally using Eclipse:

   • JAR Class Finder Plug-in
   • Class Locator Plug-in

3. If you want to find out from Internet or you do not have the jar yet:

   • jarFinder
   • findjar.com

Answer 1

If you have the jar in your class path / project path hit CTRL-SHIFT-T and type the name ... the jar will be displayed at the bottom.

If you haven't the class in your build path a) put together a dummy project containing all the jars b) I think there is a plugin to find jars from IBM Alphaworks (but that might be kind of outdated)