I\'m trying to get autocomplete working in eclipse for scala development. I\'m trying to reference a java class from a Scala class, and the autocomplete feature never finds it.
That type of auto-completion is not yet supported by the Scala plug-in. You can get a similar result by waiting for the compile error to appear, pressing Ctrl-1, and selecting the quick fix to automatically import the type.
See the "Quick fix imports" section in this "New and noteworthy" post.
Update September 2011:
Luc Bourlier has committed an improvement for this to give autocompletion for types on the classpath. It will be in the next beta (2.0.0-beta11), or grab a nightly build.