Answered: Write a program that reads in a set of…

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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Exercise 2:
Solve the programming exercise P10.19 on Page 536 on the book. Note: coin class provided in the
Moodle.
Write a program that reads in a set of coin descriptions from a file. The input file has the format
coinName1 coinValue1
coinName2 coinValue2
. . .
Add a method
void read(Scanner in) throws FileNotFoundException
to the Coin class of Section 7.2. Throw an exception if the current line is not properly formatted. Then
implement a method
static ArrayList<Coin> readFile(String filename) throws FileNotFoundException
In the main method, call readFile. If an exception is thrown, give the user a chance to select another file. If
you read all coins successfully, print the total value.

...................

This is coin class:

...................

/** A coin with a monetary value. */ public class Coin { private double value; private String name; /** Constructs a coin. @param aValue the monetary value of the coin @param aName the name of the coin */ public Coin(double aValue, String aName) { value = aValue; name = aName; } /** Gets the coin value. @return the value */ public double getValue() { return value; } /** Gets the coin name. @return the name */ public String getName() { return name; } }

Exercise 2:
Solve the programming exercise P10.19 on Page 536 on the book. Note: coin class provided in the
Moodle.
Write a program that reads in a set of coin descriptions from a file. The input file has the format
coinNamel coinValuel
coinName2 coinValue2
Add a method
void read(Scanner in) throws FileNotFoundException
to the Coin class of Section 7.2. Throw an exception if the current line is not properly formatted. Then
implement a method
static ArrayList<Coin> readFile (String filename) throws FileNotFoundException
In the main method, call readFile. If an exception is thrown, give the user a chance to select another file. If
you read all coins successfully, print the total value.

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