Code assist (ctrl+space) doesn't work on Eclipse Kepler. This happened to me this morning.
Go to Preferences > Java > Editor > Content Assist > The "Auto activation triggers for Java:" field. Paste "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz." (note the dot after z) . This is the best solution and no need to even press ctrl+space.
Solution. Go to Window -> Preferences -> Editor -> Content Assist -> Advanced and enable Parsing-based Proposals. Click Apply. Content assist should start working immediately.
This happend to me too.
For some reason Kepler changes the settings for Content Assist on Juno workspaces. Checking the Java Proposals
checkbox in Preferences -> Java\Editor\Content Assist\Advanced
should resolve this problem.
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