Answered: In the code below, we use a method from…

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

In the code below, we use a method from the Scanner object to retrieve a user response.

exchangeRate = in.nextDouble()

Why are there multiple methods like nextDouble() to retrieve user response? Explain how and when you would use one method over the other.

Expert Solution

Step 1

Why are there multiple methods like nextDouble():

There are multiple methods like nextDouble() to deal with different data types.
The method nextDouble() method is just used to take the input of float data type.
To take various other inputs, other methods are used.
Other methods which are used to take the input using the Scanner class objects:
- nextBoolean() - This function is to read boolean values from the user.
- nextInt() - This function is to read the integer value from the user.
- nextLong() - This function is used to read the long values from the user.
- nextByte() - This function is used to read the byte values from the user.

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