Please update the Snack and Drink classes so that they implement the Comparable
ID: 3699424 • Letter: P
Question
Please update the Snack and Drink classes so that they implement the Comparable interface. Comparison is based on the name of the item and follows alphabetical ordering rules, ignoring case. Items with the same name should be ordered on price in ascending order. If two items have the same name and price, they are considered equal. Write a main method that tests your compareTo() method. Submit your updated class files.
Here are the drinks each drink cost $ 0.99 cent each:
Drink 1. power-c", "Vitamin Water
Drink 2. vital-t", "Vitamin Water
Drink 3. XXX", "Vitamin Water
Drink 4. XXX", "Vitamin Water
Drink 5. XXX", "Vitamin Water
Drink 6. XXX", "Vitamin Water
Drink 7. XXX", "Vitamin Water
Drink 8. Original Coca-Cola
Drink 9. Vanilla Coca-Cola
Drink 10. Cherry Coca-Cola
Product code:
Snack code:
Drink code:
import java.time.LocalDate; import java.time.ZoneId; import java.util.Date; public abstract class Product implements Comparable<Product>{ //Shared Properties private String name; private String brand; private String foodGroup; private double price; //Nutrition Facts private double sugar; private double protein; private double sodium; private double calories; //Expiration Date - format mm/dd/yyyy private String expirationDate; //Default Constructor public Product() { this.name = null; this.brand = null; this.foodGroup = null; this.price = 0.0; this.sugar = 0.0; this.protein = 0.0; this.sodium = 0.0; this.calories = 0.0; this.setExpirationDate(calculateExpirationDate()); } //Parameterized Constructor public Product(String name, String brand, String foodGroup, double price, double sugar, double protein, double sodium, double calories) { this.name = name; this.brand = brand; this.foodGroup = foodGroup; this.price = price; this.sugar = sugar; this.protein = protein; this.sodium = sodium; this.calories = calories; this.setExpirationDate(calculateExpirationDate()); } //Copy Constructor public Product(Product productToCopy) { this.name = productToCopy.getName(); this.brand = productToCopy.getBrand(); this.foodGroup = productToCopy.getFoodGroup(); this.price = productToCopy.getPrice(); this.sugar = productToCopy.getSugar(); this.protein = productToCopy.getProtein(); this.sodium = productToCopy.getSodium(); this.calories = productToCopy.getCalories(); this.setExpirationDate(calculateExpirationDate()); } public abstract String toString(); //Temporary compares the name of the products, returns 1 if equal or -1 if not. Will be needed later. @Override public int compareTo(Product other) { int result = 0; if(this.name.equals(other.name)) { result = 1; } else { result = -1; } return result; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getBrand() { return brand; } public void setBrand(String brand) { this.brand = brand; } public String getFoodGroup() { return foodGroup; } public void setFoodGroup(String foodGroup) { this.foodGroup = foodGroup; } public double getPrice() { return price; } public void setPrice(double price) { this.price = price; } public double getSugar() { return sugar; } public void setSugar(double sugar) { this.sugar = sugar; } public double getProtein() { return protein; } public void setProtein(double protein) { this.protein = protein; } public double getSodium() { return sodium; } public void setSodium(double sodium) { this.sodium = sodium; } public double getCalories() { return calories; } public void setCalories(double calories) { this.calories = calories; } public String getExpirationDate() { return expirationDate; } public void setExpirationDate(String expirationDate) { this.expirationDate = expirationDate; } public String calculateExpirationDate() { Date today = new Date(); LocalDate localDate = today.toInstant().atZone(ZoneId.systemDefault()).toLocalDate(); int year = localDate.getYear(); int month = localDate.getMonthValue(); int day = localDate.getDayOfMonth(); //For Drinks, add 9 months if(this.getClass().getSimpleName().equals("Drink")) month += 9; //For Chips, add 3 months if(this.getClass().getSimpleName().equals("Chips")) month += 3; //For Candy, add 6 months if(this.getClass().getSimpleName().equals("Candy")) month += 6; //For Gum, add 1 year if(this.getClass().getSimpleName().equals("Drink")) year += 1; String expDate = month + "/" + day+ "/" + year; return expDate; } }Explanation / Answer
Dear,
Programs:
Product.java
import java.time.LocalDate;
import java.time.ZoneId;
import java.util.Date;
public class Product implements Comparable<Product> {
// Shared Properties
private String name;
private String brand;
private String foodGroup;
private double price;
// Nutrition Facts
private double sugar;
private double protein;
private double sodium;
private double calories;
// Expiration Date - format mm/dd/yyyy
private String expirationDate;
// Default Constructor
public Product() {
this.name = null;
this.brand = null;
this.foodGroup = null;
this.price = 0.0;
this.sugar = 0.0;
this.protein = 0.0;
this.sodium = 0.0;
this.calories = 0.0;
this.setExpirationDate(calculateExpirationDate());
}
// Parameterized Constructor
public Product(String name, String brand, String foodGroup, double price,
double sugar, double protein, double sodium, double calories) {
this.name = name;
this.brand = brand;
this.foodGroup = foodGroup;
this.price = price;
this.sugar = sugar;
this.protein = protein;
this.sodium = sodium;
this.calories = calories;
this.setExpirationDate(calculateExpirationDate());
}
// Copy Constructor
public Product(Product productToCopy) {
this.name = productToCopy.getName();
this.brand = productToCopy.getBrand();
this.foodGroup = productToCopy.getFoodGroup();
this.price = productToCopy.getPrice();
this.sugar = productToCopy.getSugar();
this.protein = productToCopy.getProtein();
this.sodium = productToCopy.getSodium();
this.calories = productToCopy.getCalories();
this.setExpirationDate(calculateExpirationDate());
}
public String toString() {
StringBuilder resultStringBuilder = new StringBuilder();
resultStringBuilder.append(this.getName() + " ");
resultStringBuilder.append(this.getBrand() + " ");
resultStringBuilder.append(this.getPrice() + " ");
resultStringBuilder.append(this.getSugar() + " ");
resultStringBuilder.append(this.getProtein() + " ");
resultStringBuilder.append(this.getSodium() + " ");
resultStringBuilder.append(this.getCalories() + " ");
resultStringBuilder.append(this.getExpirationDate() + " ");
String result = resultStringBuilder.toString();
return result;
}
// Temporary compares the name of the products, returns 1 if equal or -1 if
// not. Will be needed later.
@Override
public int compareTo(Product other) {
int result = 0;
if ((this.name).equals(other.name)) {
result = 1;
} else {
result = -1;
}
return result;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getBrand() {
return brand;
}
public void setBrand(String brand) {
this.brand = brand;
}
public String getFoodGroup() {
return foodGroup;
}
public void setFoodGroup(String foodGroup) {
this.foodGroup = foodGroup;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
public double getSugar() {
return sugar;
}
public void setSugar(double sugar) {
this.sugar = sugar;
}
public double getProtein() {
return protein;
}
public void setProtein(double protein) {
this.protein = protein;
}
public double getSodium() {
return sodium;
}
public void setSodium(double sodium) {
this.sodium = sodium;
}
public double getCalories() {
return calories;
}
public void setCalories(double calories) {
this.calories = calories;
}
public String getExpirationDate() {
return expirationDate;
}
public void setExpirationDate(String expirationDate) {
this.expirationDate = expirationDate;
}
public String calculateExpirationDate() {
Date today = new Date();
LocalDate localDate = today.toInstant().atZone(ZoneId.systemDefault())
.toLocalDate();
int year = localDate.getYear();
int month = localDate.getMonthValue();
int day = localDate.getDayOfMonth();
// For Drinks, add 9 months
if (this.getClass().getSimpleName().equals("Drink"))
month += 9;
// For Chips, add 3 months
if (this.getClass().getSimpleName().equals("Chips"))
month += 3;
// For Candy, add 6 months
if (this.getClass().getSimpleName().equals("Candy"))
month += 6;
// For Gum, add 1 year
if (this.getClass().getSimpleName().equals("Drink"))
year += 1;
String expDate = month + "/" + day + "/" + year;
return expDate;
}
}
Snack.java
public class Snack extends Product implements Comparable<Product> {
private String productType = "snack";
private boolean isSnack = true;
public Snack() {
super();
}
public static void main(String[] args) {
Product p1 = new Product("Drink 1", "power-c", "Vitamin Water", 0.99,
12.32, 23, 34, 3);
System.out.println(p1);
Product p2 = new Product("Drink 2", "vital-t", "Vitamin water", 0.99,
12.32, 23, 34, 3);
System.out.println(p2);
System.out.println("p1.compareTo(p2) : " + p1.compareTo(p2));
System.out.println("p2.compareTo(p2) : " + p2.compareTo(p2));
Snack s1 = new Snack(p1);
Snack s2 = new Snack(p2);
System.out.println("s1.compareTo(s2) : " + s1.compareTo(s2));
System.out.println("s2.compareTo(s2) : " + s2.compareTo(s2));
}
public String getProductType() {
return productType;
}
public boolean isSnack() {
return isSnack;
}
public Snack(String name, String brand, String foodGroup, double price,
double sugar, double protein, double sodium, double calories) {
super(name, brand, foodGroup, price, sugar, protein, sodium, calories);
}
// Copy Constructor
public Snack(Product productToCopy) {
super();
this.setName(productToCopy.getName());
this.setBrand(productToCopy.getBrand());
this.setFoodGroup(productToCopy.getFoodGroup());
this.setPrice(productToCopy.getPrice());
this.setSugar(productToCopy.getSugar());
this.setProtein(productToCopy.getProtein());
this.setSodium(productToCopy.getSodium());
this.setExpirationDate(productToCopy.getExpirationDate());
}
@Override
public String toString() {
StringBuilder resultStringBuilder = new StringBuilder();
resultStringBuilder.append(this.getName() + " ");
resultStringBuilder.append(this.getBrand() + " ");
resultStringBuilder.append(this.getPrice() + " ");
resultStringBuilder.append(this.getSugar() + " ");
resultStringBuilder.append(this.getProtein() + " ");
resultStringBuilder.append(this.getSodium() + " ");
resultStringBuilder.append(this.getCalories() + " ");
resultStringBuilder.append(this.getExpirationDate() + " ");
String result = resultStringBuilder.toString();
return result;
}
}
Drink.java
public class Drink extends Product implements Comparable<Product> {
private String productType = "drink";
private boolean isDrink = true;
public Drink() {
// TODO Auto-generated constructor stub
super();
}
public static void main(String[] args) {
Product p1 = new Product("Drink 1", "power-c", "Vitamin Water", 0.99,
12.32, 23, 34, 3);
System.out.println(p1);
Product p2 = new Product("Drink 2", "vital-t", "Vitamin water", 0.99,
12.32, 23, 34, 3);
System.out.println(p2);
System.out.println("p1.compareTo(p2) : " + p1.compareTo(p2));
System.out.println("p2.compareTo(p2) : " + p2.compareTo(p2));
Drink d1 = new Drink(p1);
Drink d2 = new Drink(p2);
System.out.println("d1.compareTo(d2) : " + d1.compareTo(d2));
System.out.println("d2.compareTo(d2) : " + d2.compareTo(d2));
}
public String getProductType() {
return productType;
}
public boolean isDrink() {
return isDrink;
}
public Drink(String name, String brand, String foodGroup, double price,
double sugar, double protein, double sodium, double calories) {
super(name, brand, foodGroup, price, sugar, protein, sodium, calories);
}
// Copy Constructor
public Drink(Product productToCopy) {
super();
this.setName(productToCopy.getName());
this.setBrand(productToCopy.getBrand());
this.setFoodGroup(productToCopy.getFoodGroup());
this.setPrice(productToCopy.getPrice());
this.setSugar(productToCopy.getSugar());
this.setProtein(productToCopy.getProtein());
this.setSodium(productToCopy.getSodium());
this.setExpirationDate(productToCopy.getExpirationDate());
}
@Override
public String toString() {
StringBuilder resultStringBuilder = new StringBuilder();
resultStringBuilder.append("Drink: " + " ");
resultStringBuilder.append(this.getName() + " ");
resultStringBuilder.append(this.getBrand() + " ");
resultStringBuilder.append(this.getPrice() + " ");
resultStringBuilder.append(this.getSugar() + " ");
resultStringBuilder.append(this.getProtein() + " ");
resultStringBuilder.append(this.getSodium() + " ");
resultStringBuilder.append(this.getCalories() + " ");
resultStringBuilder.append(this.getExpirationDate() + " ");
String result = resultStringBuilder.toString();
return result;
}
}
OUTPUT :
>javac *.java
>java Snack
Drink 1 power-c 0.99 12.32 23.0 34.0 3.0 4/4/2018
Drink 2 vital-t 0.99 12.32 23.0 34.0 3.0 4/4/2018
p1.compareTo(p2) : -1
p2.compareTo(p2) : 1
s1.compareTo(s2) : -1
s2.compareTo(s2) : 1
>java Drink
Drink 1 power-c 0.99 12.32 23.0 34.0 3.0 4/4/2018
Drink 2 vital-t 0.99 12.32 23.0 34.0 3.0 4/4/2018
p1.compareTo(p2) : -1
p2.compareTo(p2) : 1
d1.compareTo(d2) : -1
d2.compareTo(d2) : 1
Thank You.