Eclipse autocomplete not working

Question

The autocomplete of eclipse is not working now and I searched for hours but I couldn\'t find an answer to solve it. I haven\'t used it for long time then the first thing aft

Answer 1

Window->Preferences->Java->Editor->Content Assist->Advanced

The following options have to be selected, then the autocomplete worked . No restart is required.

Java Proposals  (must be selected, not sure the follows)

Java Non-Type Proposals
Java Type Proposals
Java Proposals (Task-focused)

Answer 2

This is recurring for me. I'm using Eclipse 2019-03 in Windows 10. The steps below work for my case, and does not require a restart.

Window->Preferences->Java->Editor->Content Assist->Advanced

The following options are de-selected, and when I set them the autocomplete worked as before. No restart needed.

1. Java Non-Type Proposals
2. Java Proposals
3. Java Type Proposals
4. Java Proposals (Task-focused)

I don't know what's triggering this but it only happens after I've created a new project. Usually doesn't. It simply doesn't happen often enough for me to notice a pattern to follow up on more. Clearly this problem occurs with a variety of causes, so review the other answers to see if they match your case.

Answer 3

The hot key combination ctrl+space might be conflict with other settings in system if you are using windows.

Try modify this combination like alt+/, i always use this one since the first time i knew eclipse. It works well.

Hope it works for you.

Answer 4

Recently, I also faced this issue. When I install neon version eclipse. By (1) deleting respective class, (2) restoring defaults appearance and (3) restarting eclipse, solved the problem for me. Hope it will help someone.

Answer 5

Also a possible problem that solved for me: http://blog.rtwilson.com/how-to-solve-the-ctrl-space-auto-complete-not-working-problem-in-eclipse/

Answer 6

I had the same Problem on Ubuntu 14.04. The problem for me was that ibus used Ctrl+Space as a shortcut. I solved it by starting the program ibus-setup and chaning the shortcut to something else than Ctrl+Space.