This is the question I am stuck on - In the exercises in Chapter 6, you created a class named Purchase. Each Purchase contains an invoice number, amount of sale, amount of sales tax, and several methods. Add get methods for the invoice number and sale amount fields so their values can be used in comparisons. Next, write a program that declares an array of five Purchase objects and prompt a user for their values. Then, in a loop that continues until a user inputs a sentinel value of Z, ask the user whether the Purchase objects should be sorted and displayed in invoice number order or sale amount order. This is the code I have - public class Purchase { private int invoiceNumber; private double saleAmount; private double tax; private static final double RATE = 0.05; public void setInvoiceNumber(int num) { invoiceNumber = num; } public void setSaleAmount(double amt) { saleAmount = amt; tax = saleAmount * RATE; } public double getSaleAmount() { return saleAmount; } public int getInvoiceNumber() { return invoiceNumber; } public void display() { System.out.println("Invoice #" + invoiceNumber + " Amount of sale: $" + saleAmount + " Tax: $" + tax); } } -------------------------------------------------------------------------- import java.util.Scanner; public class SortPurchasesArray { public static void main(String[] args) { // Write code here } public static void sortBySaleAmount(Purchase[] array) { // Write code here } public static void sortByInvoice(Purchase[] array) { // Write code here } public static void display(Purchase[] p, String msg) { // Write code here } }

This is the question I am stuck on - In the exercises in Chapter 6, you created a class named Purchase. Each Purchase contains an invoice number, amount of sale, amount of sales tax, and several methods. Add get methods for the invoice number and sale amount fields so their values can be used in comparisons. Next, write a program that declares an array of five Purchase objects and prompt a user for their values. Then, in a loop that continues until a user inputs a sentinel value of Z, ask the user whether the Purchase objects should be sorted and displayed in invoice number order or sale amount order. This is the code I have - public class Purchase { private int invoiceNumber; private double saleAmount; private double tax; private static final double RATE = 0.05; public void setInvoiceNumber(int num) { invoiceNumber = num; } public void setSaleAmount(double amt) { saleAmount = amt; tax = saleAmount * RATE; } public double getSaleAmount() { return saleAmount; } public int getInvoiceNumber() { return invoiceNumber; } public void display() { System.out.println("Invoice #" + invoiceNumber + " Amount of sale: $" + saleAmount + " Tax: $" + tax); } } -------------------------------------------------------------------------- import java.util.Scanner; public class SortPurchasesArray { public static void main(String[] args) { // Write code here } public static void sortBySaleAmount(Purchase[] array) { // Write code here } public static void sortByInvoice(Purchase[] array) { // Write code here } public static void display(Purchase[] p, String msg) { // Write code here } }

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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This is the question I am stuck on -

In the exercises in Chapter 6, you created a class named Purchase. Each Purchase contains an invoice number, amount of sale, amount of sales tax, and several methods. Add get methods for the invoice number and sale amount fields so their values can be used in comparisons.

Next, write a program that declares an array of five Purchase objects and prompt a user for their values. Then, in a loop that continues until a user inputs a sentinel value of Z, ask the user whether the Purchase objects should be sorted and displayed in invoice number order or sale amount order.

This is the code I have -

public class Purchase

{

private int invoiceNumber;

private double saleAmount;

private double tax;

private static final double RATE = 0.05;

public void setInvoiceNumber(int num)

{

invoiceNumber = num;

}

public void setSaleAmount(double amt)

{

saleAmount = amt;

tax = saleAmount * RATE;

}

public double getSaleAmount()

{

return saleAmount;

}

public int getInvoiceNumber()

{

return invoiceNumber;

}

public void display()

{

System.out.println("Invoice #" + invoiceNumber +

" Amount of sale: $" + saleAmount + " Tax: $" + tax);

}

--------------------------------------------------------------------------

import java.util.Scanner;

public class SortPurchasesArray {

public static void main(String[] args) {

// Write code here

}

public static void sortBySaleAmount(Purchase[] array) {

// Write code here

}

public static void sortByInvoice(Purchase[] array) {

// Write code here

}

public static void display(Purchase[] p, String msg) {

// Write code here

}

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