Eclipse Java editor : errors no more indicated when typing

Question

In my classic java editor panel, errors are no more indicated when live typing but only when I save changes!?

(I talk about the red underline style on compile error)

I try to find in Preferences what configuration could affect this but I found nothing about this. I never saw that in eclipse, I've never had this problem and I used it for maybe 10 years now..

Answer 1

Window → Preferences → Java → Editor → Check " Report problems as you type ":