Update 2019: Code Mining is part of Eclipse now (Version: 2019-09 – but also some versions earlier).
Preferences -> Java -> Editor -> Code Minings -> [x] Show method parameter names

(screenshot is spring tool suite STS which is based on eclipse)
Update 2019: Code Mining is part of Eclipse now (Version: 2019-09 – but also some versions earlier).
Preferences -> Java -> Editor -> Code Minings -> [x] Show method parameter names

(screenshot is spring tool suite STS which is based on eclipse)