Question

Read the entire document before starting to write code.
Write and test a Java project that satisfies the following requirements:

Create a measurement converter project that can convert between units of price. (pounds and ounces).

Use this table of conversion for your calculations.

The constant for conversion is 1 pound = 16 ounces or 16 ounces = 1 pound

Write a class definition file named UnitPriceConverter that has these fields and one constant.

priceOfItem weightInPounds pricePerPound pricePerOunce
constant: ouncesPerPound

Write the following methods: Two constructor methods:

The default constructor sets all the field values to zero except the constant. The constant is set using the conversion given above.

The overloaded constructor accepts a value for the price of the item and the weight of the item in pounds and then calculates the values for pricePerPound and pricePerOunce (use the constant for your conversion calculation).

Write two set( ) methods that allows the user to change the price of the item and the weight in pounds. This set( ) method must recalculate the price per pound and the price per ounce.

Write four get( ) methods. Once to get the price, one to get the weight in pounds, one to get the price per pound and one to get the price per ounce.

Write a driver class with the main( ) method. This main method should provide the following utility:

Create an instance of the UnitPriceConverter using the default values.

Write a loop that allows the user to reset the price and/or weight in pounds using the set( ) method and prints both the price per pound of the item and the price per ounce of the item in each iteration. Continue looping until the user indicates he/she is done. After the user decides to quit, print a goodbye message.

Answer 1

Following is the answer:

UnitPriceConverter.java

public class UnitPriceConverter {

    //constant value
    private static final int ouncesPerPound = 16;

    private double price;
    private double weight;

    //default constructor
    UnitPriceConverter(){
        this.price = 0.0;
        this.weight = 0.0;
    }

    //Paramaterize constructor
    UnitPriceConverter(double weight, double price){
        this.weight = weight;
        this.price = price;
    }

    //method that convert price per ounce
    public double getPricePerOunce(){
        return (weight * price) * 16;
    }

    //method that convert price per pound
    public double getPricePerPound(){
        return (weight * price)/ 16;
    }

    //getter and setter methods
    public double getPrice() {
        return price;
    }

    public void setPrice(double price) {
        this.price = price;
    }

    public double getWeight() {
        return weight;
    }

    public void setWeight(double weight) {
        this.weight = weight;
    }

    //toString method to print the values
    @Override
    public String toString() {
        return "Weight: " + weight + "
Price: " + price +  "
Price Per Ounce: " + getPricePerOunce() + "
Price Per Pound: " + getPricePerPound();
    }
}

main.java

import java.util.Scanner;

public class main {
    public static void main(String[] args) {

        //Create instance of UnitPriceConverter
        UnitPriceConverter u = new UnitPriceConverter();

        //Scanner for get the user inputs
        Scanner sc = new Scanner(System.in);

        char ch;
        //print the default values
        System.out.println(u.toString());

        //Ask user for continue or not
        System.out.print("Do Yo Want to Continue?Y/N: ");
        ch = sc.next().charAt(0);

        //loop iterates untill user inputs N
        while (ch == 'Y') {
            double weight, price;

            //get weight and price from user
            System.out.print("Enter new Weight: ");
            weight = sc.nextDouble();
            System.out.print("Enter new Price: ");
            price = sc.nextDouble();

            //set the price and weight
            u.setPrice(price);
            u.setWeight(weight);

            //print the values
            System.out.println(u.toString());

            //again ask the user to continue or not
            System.out.print("
Do Yo Want to Continue?Y/N: ");
            ch = sc.next().charAt(0);
        }

        //goodbye message
        System.out.println("goodbye.");
    }
}

Output: