The build-in autocompletion in eclipse 2019-06 (4.12) doesn't consider gaps in the typed class and method names. In eclipse Photon (4.8) this was working properly. Is this feature no longer available?
I have restored the preferences shown in Java >> Editor >> Content Assist >> Advanced to Default. The problem is still there.
JButton button = new JButton();
button.setBorderPainted(true);
Typing button.setPainted and pressing [CTRL] + [SPACE] shows no results. The method setBorderPainted(boolean) should be proposed.
EDIT: Installing the plug-in eclipse Code Recommenders 2.5.4 [1] has solved this issue.
[1] https://projects.eclipse.org/projects/technology.recommenders