question

Question

how to install Java library scanner Here?

Answer 1

Scanner is not a library.
Scanner is inbuilt class in util package

So just import it in Java class.

Answer 2

On app? Hmm you can't..

Answer 3

Scanner is a inbuilt Java class, so if yo've already installed the JDK (or a IDE in your device) then you can just import that class and many others included.