Eclipse/Java Code Completion Not Working

Eclipse/Java code completion not working

Try restoring the default options in 'Windows > Preferences > Java > Editor > Content Assist > Advanced'

An example of the kind of data you see in this preference screen, however not necessarily what you currently have.

(From Vadim in this blog post " Content Assist Duplicates in Eclipse (Mylyn)":

if have duplicate Mylyn entries, uncheck the duplicate entries that do not contain "(Mylyn)" in their name)

The Eclipse help page defines the default list to restore:

Select the proposal kinds contained in the 'default' content assist list:

• Other Java Proposals,
• SWT Template Proposals,
• Template Proposals,
• Type Proposals

Eclipse autocomplete not working

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.

Eclipse 2021-09 code completion not showing all methods and classes

In Eclipse 2021-09 (4.21) everything of java.awt.* is filtered out in the content assist by default.

To disable this default filter, go to the preferences (Window > Preferences; in macOS in the application menu) Java > Appearance > Type Filters and uncheck the checkbox java.awt.*.

I reported it to Eclipse and it has been fixed within two weeks, so it will be in the next release Eclipse 2021-12 (4.22) that will be released on December 8, 2021 (and also sooner in the milestone builds starting with M2):

• Eclipse bug 576549 - [content assist] Missing proposals in Swing, etc. because of java.awt.* type filter enabled by default.

Auto code completion on Eclipse

You can also set auto completion to open automatically while typing.

Go to Preferences > Java > Editor > Content Assist and write .abcdefghijklmnopqrstuvwxyz in the Auto activation triggers for Java field.

See this question for more details.

Eclipse - CTRL+Space autocompletion does not work any more for Java

Go to Preferences » Java » Editor » Content Assist » Advanced.
Make sure Other Java Proposals is ticked/checked

Eclipse Kepler Code completion not working

this has already been marked as a bug in bugzilla:
https://bugs.eclipse.org/bugs/show_bug.cgi?id=395604

How to enable auto-complete (intellisense) in Eclipse IDE for Java

I found a workaround to fix this issue in the below article.

Eclipse Java autocomplete not working

In Windows:

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

In MacOSX:

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

Then, make sure the following options are ticked in both top (default content assist list) and bottom (Content Assist Cycling) sections.

Java Non-Type Proposals
Java Proposals
Java Type Proposals

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