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I have noticed that autocomplete is not working in some of java files in Eclipse. Also, the files where autocomplete is not working, display a hollow "J" as the icon for the Java file. The files where autocomplete is working, icon for java file is a filled "J"
I am wondering if someone can point out what went wrong all of suddent, why the change in icons and why autocomplete and syntax highlighting is turned-off in the files with a hollow "J" icon?
Thanks.
update
Basically, I was doing what VonC has suggested but Eclipse was not refreshing that it why I was thinking that VonC's suggestion isn't working, after doing a refresh, the problem resolved.
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By default Eclipse triggers the autocompletion after a certain delay when you insert a dot. This is sensible because the dot signals the IDE for example that you got an instance of a class and want to call a method on it. You can bring up the autocompletion by manually pressing Cmd plus Space whenever you want.
Try this: Go to Preferences » Java » Editor » Content Assist » Advanced. Make sure Other Java Proposals is ticked/checked.
Since this question is highly ranked on Google, I will add a solution to fix general auto complete issue, not for 'hollow J' ones.
Try Window (Windows/Linux) or Eclipse (OS X) -> Preferences -> Java -> Editor -> Content Assist -> Restore Defaults
also
Content Assist -> Advanced -> Restore Defaults
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