I checked out project from SVN into Eclipse. I tried to work on it, but when I hit Ctrl+Space, the expected Code Assist did not show up. What went wrong?
It turned out that Eclipse did not recognize the newly checked out project as Java Project. I right clicked and chose Properties, and I could not find the option to set the Java build path and lib.
To solve it, I had to delete the project from workspace. Only from workspace, not from disk. Then I reopened the project with: New project with existing source. And I tweaked the lib and build path. And there, Code Assist showed up again :)