I switched to Eclipse Juno for android development recently.When I press "ctrl+space" to see available proposals.But it shows "No Default Proposals".
Step 1: Open your Eclipse or Spring Tool Suite, then go to the Window > Preferences as shown in the below image. Step 2: In the next screen go to the Java > Editor > Content Assist > Auto activation triggers for Java as shown in the below image.
Now based on the references, Eclipse will trigger autocomplete suggestions for you.
To enable the Content Assist window to open automatically, go to the Content Assist Preferences page, accessed from Window | Preferences | PHP | Editor | Content Assist and mark the 'Enable auto-activation' checkbox.
I have the same problem; it occurred after I upgraded to Juno.
My fix: - Window->Preferences->Java->Editor->Content Assist->Advanced - explicitly check Java Proposals - Apply
That fixed it for me. (I don't know why Restore Defaults does not set this, seems like it should but it didn't work for me)
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