Chapter 6, Problem 4E

Explanation of Solution

Program code:

Main.java:

//import the required packages

import java.io.File;

import java.io.FileNotFoundException;

import java.util.Scanner;

//define a class

public class Main

{

//declare the required variables

private static final double MONEY_QUARTER = 0.25;

private static final double MONEY_DIME = 0.10;

private static final double MONEY_NICKEL = 0.05;

private static final double MONEY_PENNY = 0.01;

//define a method countCoins()

public static double countCoins(Scanner input)

{

//declare the required variables

double totalAmount = 0.0;

int coinCount = 0;

String coinType;

//ierate a while loop

while (input.hasNext())

{

//get the tokens cointype and coincount

coinCount = input.nextInt();

coinType = input.next();

//if coin type is "QUARTERS"

if (coinType.equalsIgnoreCase("QUARTERS"))

{

    //calculate the total amount

    totalAmount += MONEY_QUARTER * coinCount;

}

//if coin type is "DIMES"

else if (coinType.equalsIgnoreCase("DIMES"))

{

    //calculate the total amount

    totalAmount += MONEY_DIME * coinCount;

}

//if coin type is "NICKELS"

else if (coinType.equalsIgnoreCase("NICKELS"))

{

    //calculate the total amount

    totalAmount += MONEY_NICKEL * coinCount;

}

//if coin type is "PENNIES"

else if (coinType.equalsIgnoreCase("PENNIES"))

{

    //calculate the total amount

    totalAmount += MONEY_PENNY * coinCount;

}

else

{

//print the coin type is wrong

System...