Answered: Which line of code creates a Scanner to…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

Which line of code creates a Scanner to read a file named "input.txt"?

A, Scanner in = new Scanner (System.in);

B. Scanner in = new Scanner (new File(input.txt));

C. Scanner in = new Scanner (new File("input.txt"));

D. Scanner in = new Scanner (input.txt);

E. none listed

Expert Solution

Step 1

Scanner class :-

In the java.util package, there is a class called Scanner that is used to collect user input. Use any of the available methods listed in the Scanner class documentation to use the class by creating an object of it.

A class called Scanner is used to get input of primitive kinds like strings and int, double, etc. Although it is the simplest method for reading input in a Java application, it is not very effective if you need an input method for situations where time is a factor, such as in competitive programming.

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