You can try to check that : - you are in the java view. - your project has the javanature in you .project (that you can see in ressource view) - your source path is referenced as "kind=src" (if your source are in src/java) in the .classpath that you can see in the ressource view.
He was giving me directions and I was powerless to resist. I cannot resist this tiny ad:
Building a Better World in your Backyard by Paul Wheaton and Shawn Klassen-Koop