Ctrl + Space not working for content assist on eclipse

Question

My problem is that the content assist window won't pop up after clicking Ctrl + Space. I checked my shortcuts and the content assist is bound to Ctrl + Space. Sometimes the window automatically pops up making suggestion after typing dot e.g., but this won't happen when using the keys combination.

Eclipse version:

Eclipse Java EE IDE for Web Developers.

Version: Kepler Service Release 1 Build id: 20130919-0819

My OS is Ubuntu 12.04 if that matters.

possible duplicate of [Ctrl Space Not Working in Eclipse Helios on Win 7](http://stackoverflow.com/questions/5509726/ctrl-space-not-working-in-eclipse-helios-on-win-7) — aruisdante, Jun 02 '14 at 03:03
Also could be a duplicate of this: https://stackoverflow.com/questions/17358312/code-assist-ctrlspace-doesnt-work-on-eclipse-kepler?rq=1 — aruisdante, Jun 02 '14 at 03:04

score 62 · Answer 1 · answered Jan 20 '15 at 07:48

62

In my case; Window>Preferences>Java>Editor>Content Assist>Advanced

Make sure Select the proposal>Template Proposals,SWT Template Proposals,Java Proposals ,Content assist cycling>Template Proposals,SWT Template Proposals,Java Proposals is ticked.

answered Jan 20 '15 at 07:48

devcelebi

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Thanks @devcelebi it solving my problems, In my eclipse setting does not selected Java Proposals. – Hitesh May 29 '19 at 13:29

score 45 · Answer 2 · edited Aug 06 '18 at 10:32

45

Go to Windows > Preferences > Java > Editor > Content Assist > Advanced > select all Java only. If you select all, then multiple occurrence of same instance would be shown in Suggestion list. which might be annoying some times.

edited Aug 06 '18 at 10:32

Nic3500

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answered Aug 06 '18 at 10:25

niranjan bagade

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Its works fine for me. "Java Proposals" was suffice. I am using Eclipse Version: 2019-03 (4.11.0). Thanks. – Tarun Kumar Jun 24 '19 at 10:44

score 40 · Accepted Answer · answered Jun 02 '14 at 04:53

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I managed to fix it finally. The problem was that the ibus was overriding the shortcut so I deleted this shortcut configuration.

Type ibus in the dash: Search for ibus

Then select Keyboard Input Methods. From there click on the first three dots next to the Enable or disable textfield. This windows should appear: Shortcuts

If there is something bound to Ctrl + Space simply delete it.

answered Jun 02 '14 at 04:53

Ivaylo Toskov

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I can confirm this fixed the same problem with a combination of Xubuntu 14.04 and Eclipse Luna 4.4.1. Very grateful, Ivaylo Toskov! – Dec 12 '14 at 01:40
Thankyou ! This was driving me crazy ! – Nicholas Feb 15 '15 at 20:50
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Thanks! This is exactly what caused my problem in XFCE. Just FYI The same dialog can be displayed by typing `ibus-setup` in terminal (source: http://nixnote.blogspot.de/2012/08/ctrlspace-content-assist-doesnt-work-in.html) – oᴉɹǝɥɔ Jul 06 '15 at 20:32

score 14 · Answer 4 · answered Nov 11 '19 at 18:59

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For that Go to

Eclipse --> Windows --> Preferences --> Java --> Editor --> Content Assist --> Advanced --> select all Java & Java Type Proposals.

and check mark : Java Proposals(Code Recommenders)

answered Nov 11 '19 at 18:59

Sidharth K.Burnwal

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Thaaaaaaaaaaaaaaaaaaaaaaanks maaan – Richard Willian Mar 26 '20 at 00:31

score 8 · Answer 5 · edited Apr 30 '19 at 11:32

To enable Ctrl+Space.

Go to Control Panel --> Region and Language --> select Keyboard and Languages tab --> Change Keyboard button --> select General tab --> Under Installed Services --> Remove all languages except English(United States). click apply and ok.
Eclipse --> Windows --> Preferences --> Java --> Editor --> Content Assist --> Advanced --> select all Java & Java Type Proposals.
Eclipse --> Windows --> Preferences --> General keys --> Type Content Assist in right side search box --> Select command Content Assist --> click on Restore To Default --> Apply --> ok

Now you are ready to use ctrl + space feature for content assist.

Upvoted even if step 1 appears to be nonsense for someone using Ubuntu and not necessarily in US English, and step 3 doesn't appear to exist any more in Eclipse 6-19 — Gwaptiva, Jun 29 '19 at 09:48

score 8 · Answer 6 · edited Oct 04 '17 at 06:46

8

Earlier I was also facing the same issue : I just followed below steps :

Go to Windows --> Preferences --> Java --> Editor --> Content Assist --> Advanced --> select all Java & Java Type Proposals.
Click on Apply and close it.
Restart the eclipse.

enter image description here

edited Oct 04 '17 at 06:46

V-rund Puro-hit

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answered Oct 04 '17 at 06:35

Umang Boriwala

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yes, and you should do this for C,C++ editor as well if you use CDT and have that issue. The lists of proposal items to check is a bit smaller, but checking all of both lists solved my problem – woodz Apr 04 '22 at 16:10

score 4 · Answer 7 · answered Mar 09 '22 at 11:32

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For mac:

By default ˆ+space is assigned for switching inputs of the keyboard.

You can deselect that option by going to

System preference > Keyboard > Shortcuts > Input Sources

check for shortcut that using your key and disable it

answered Mar 09 '22 at 11:32

Akshay Bhimani

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Thanks dude...!!! That was the reason for me too.. – Gayan Chinthaka Mar 09 '23 at 17:59

score 2 · Answer 8 · answered May 26 '18 at 21:04

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Ctrl+space was not working in my eclipse.Somehow it got disabled.

I have tried many options and didnt worked any options.

Finally this was work out

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.

answered May 26 '18 at 21:04

priya

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Best solution so far for me as I shifted to mac and nothing else worked. – VMi Jul 31 '22 at 22:10
If you really like the proposals dialog popping up with just about every key you type, then, sure, do this. I find it VERY annoying. If you're just having trouble getting Ctrl-Space to work, see the other recommendations in this thread. Also, check to make sure that you don't have other applications running that are using Ctrl-Space as a shortcut, as mentioned below: https://stackoverflow.com/a/38090250/8517076 – Terry Lacy Jun 22 '23 at 12:27

score 1 · Answer 9 · answered Jun 06 '14 at 16:24

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It happened to me also, What I have done is change the workspace folder to Another folder and problem solved!

answered Jun 06 '14 at 16:24

Guy

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score 1 · Answer 10 · edited Apr 30 '19 at 11:31

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Though I have eclipse proposal settings configured properly it was not working for me. In my case Ctrl+space key combination was hijacked by another background running process (I was running AllwaysOnTop utility for windows). it worked after exit that process. :)

edited Apr 30 '19 at 11:31

Ahmed Ashour

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answered Jun 29 '16 at 04:13

Ashok Kumar Ithabathula

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score 0 · Answer 11 · answered Feb 07 '15 at 05:43

This issue happened to me and none of the stack solutions seemed to resolve it. I finally figured that some other windows task was stealing my hotkey press. If nothing else works, I recommend that you downloaded a free software 'Windows Hotkey Explorer' that reported the registered hotkeys.

In my particular situation, I found ctrl+space was seized by 'blackboard collaborate' (a unpalatable java application for webcasts used by some of my courses).

I closed Eclipse killed all java processes (which included blackboard). Restarted eclipse and my autocomplete was back!

(Note: Hotkey Explorer was incredibly buggy and crashed every time I used it. I was able to get the information I needed before it crashed though so it was useful. Another (shareware) application that I didn't use but noticed online is: Hotkey Commander.

score 0 · Answer 12 · answered Jul 30 '21 at 06:29

I was facing the same issue. If you use OS X Eclipse Ctrl+Space shortcut can be interfering with OS X system's "Selecting previous input source" using Ctrl+Space shortcut as default.

It is necessary to edit System Preferencies/Keyboard/Shortcuts/Input Source and uncheck the "Selecting previous input source" or change the shortcut on something else. Eclipse should work after that even without restart.

score 0 · Answer 13 · answered Jun 30 '23 at 10:00

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I had the same problem, it turned out that the Powertoys for Windows app suite overrides this shortcut for the "peek" utility. Solution: change the shortcut or disable the utility if you don't need it.

answered Jun 30 '23 at 10:00

Dario L.

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The question asker (OP) started that they are not using Windows. – ryanwebjackson Jul 05 '23 at 20:57
Your answer could be improved with additional supporting information. Please [edit] to add further details, such as citations or documentation, so that others can confirm that your answer is correct. You can find more information on how to write good answers [in the help center](/help/how-to-answer). – Community Jul 07 '23 at 07:48

Ctrl + Space not working for content assist on eclipse

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