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 after opening it was to install SWT and windows builder even though I had swing installed. What I mean is, it is may possibly be because of some conflict caused by swt and swing(I read something about a conflict but I don't if this is possible).

Strange thing is it doesn't show anything when I press ctrl+space but when I go Edit-> Content Assist -> Default(it says Ctrl+Space nearby it), it shows things needed to be shown/works as desired.

public class Dsada {     String sssss;     public Dsada(){         sss //pressing ctrl+space is not working,Edit->ContentAssist->Default works fine     } } 

The solution is not to tick/untick some stuff under Windows->Preferences->...->Content Assist-> Advanced. I checked if "ctrl+space" is hijacked by some other thing which is not and checked keyboard language which is English(Those are suggested in mkyong).

I read something about a bug but I couldn't understand. I tried to delete eclipse and re-install again but I guess some settings just stayed in the machine so that it didn't work.

Thanks in advance,

Answer 1

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 2

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.