Two questions about IDEA automatic completion Code

after coming from eclipse, I am not used to many operations and settings. I would like to ask
1. How can automatic completion display the overloading of construction methods, for example:

eclipse

2:

:

eclipse is automatically completed with formal parameters, and the tab key can be used to switch formal parameters for editing

Mar.22,2021

come to this system to learn about
https://github.com/judasn/Int.

.

idea doesn't seem to have this function ~
clipboard.png

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