What is the role of system.in

Question

hello, I don't understand what is system.in
as I understand, system.in is a Standart input using InputStream but why do I need to use Scanner or BufferedReader etc ?
thank you

Answer 1

When you do Java, you will regularly have those "Why Do I Have To Do This By Hand? What Else Could I Possibly Want?" moments.

Answer 2

I understand but in the other hand I don't understand what is exactly System.in is it an input or something else ?

Answer 3

It is an input stream, yes. And by default it's your console / command line.