Diff beteew Scanner class and buffered class.?

Question

Which one is efficient and should be used in program

Answer 1

BufferedReader / BufferedWriter for file handling imo

Answer 2

Can you be a little more specific.

Answer 3

I have to do final semstr project which is based on library management system . I have to use file handling also in this projct but now i am little confuse. That which reader and writer methos should i use. Bufferedreader and wrtier or print writer/reader to access data kr store data in a file.
Avinesh