Eclipse Java Content Assist not working

Answer 1

Looks like your mylyn install may be broken try removing the mylyn plugin and see how you get on.

Answer 2

When I had a similar problem, I simply uninstalled the Mylyn/Java integration. I don't use Mylyn, and although I know some people consider it to be the best thing since sliced bread, I've never found it to be anything other than a way to screw my name completion.

Note that you don't want to disable the "Java Proposals (Task-Focused)" that that error message was trying to tell you about. That'll disable name completion as well.

Answer 3

I was having the same issue, but my problems started when i upgrade my project from gwt 1.5 to gwt 1.7. I read your comments and i just make two changes. Increase the Xmx to -Xmx768m and unmark Java Proposals (Task-Focused) and mark just Java Proposals. It's being work fine since i did this changes. I hope it can help you.

Answer 4

I had the same issue on eclipse 3.5. Upgrading mylyn features resolved it

Answer 5

Mylyn (or its code assist) seems to be rather picky about resources in the build path.

I had the issue and it was caused by binary files which I had accidentally added to the Eclipse built path. That does not cause any compile error or warnings but causes the exception during code completion you mention in your post.

Answer 6

For me it works by doing prefrerences > general > keys > Restore Defaults

Dont know its crazy but thats what finally works after all the googling and trail following.

Regards, Manish