Question

Task:
Write a program that creates a class Apple and a tester to make sure the Apple class is crisp
and delicious.
Instructions:
First create a class called Apple
 The class Apple DOES NOT HAVE a main method
 Some of the attributes of Apple are
o Type: A string that describes the apple. It may only be of the following types:
 Red Delicious
 Golden Delicious
 Gala
 Granny Smith
o Weight: A decimal value representing the apple’s weight in kilograms. The
weight must be between 0kg and 2kg
o Price: The price per apple. This must be a non­negative decimal value.
 Create the Default Constructor – sets everything to default values and has no
parameters.
 Create Accessors and Mutators for each instance variable
o MAKE SURE THE MUTATORS CHECK FOR VALID VALUES!
 Create the following Methods
o toString() : Displays the values of the instance variables on the console.

Finally create a class called AppleTester
 This class DOES HAVE a main method
 Create at least 3 different types of apples
 Test if the accessors, mutators, and other methods work as intended.

Sample Output:
Welcome to the apple tester!!!
Creating the first apple!
Default values of the first apple object:
Type: Gala
Weight: 0.5 kg
Price: $0.88
Creating the second apple object!
Enter the type of the second apple object:
Granny Smith
Enter the weight of the second apple object:
0.7
Enter the price of the second apple object:
1.45
Values of the second apple object:
Type: Granny Smith
Weight: 0.7 kg
Price: $1.45
Creating the third apple object!
Enter the type of the third apple object:
Banana
Invalid value for type!
Enter the weight of the third apple object:
3.5
Invalid value for weight!
Enter the price of the third apple object:
­2.22
Invalid value for price!
Printing the third apple’s values which should have not changed from the default values
Retrieving the third apple object's type: Gala
Retrieving the third apple object's weight:0.5 kg
Retrieving the third apple object's price:$0.88

Note: may you copy and paste the code once you are done, thanks,

also may you complete it within 4 hours please.

Immediate upvote.

Answer 1

Below is the source code for the two classes:

1. Apple class:

public class Apple
{

   private String type;
   private double weight;
   private double price;
  
   //default constructor
   public Apple ()
   {
       this.type = "Gala";
       this.weight = 0.5;
       this.price = 0.88;
   }
   //getters
   public String getType()
   {
       return this.type;
   }
  
   public double getWeight()
   {
       return this.weight;
   }
  
   public double getPrice()
   {
       return this.price;
   }
  
   //Setters
   public void setType (String des)
   {
       System.out.println("des: " + des);
       if (des.equalsIgnoreCase("Red Delicious") == false && des.equalsIgnoreCase("Golden Delicious") == false && des.equalsIgnoreCase("Gala") == false && des.equalsIgnoreCase("Granny Smith") == false)
       {
           System.out.println ("Invalid value for type!");
           return;
       }
       type = des;
   }
  
   public void setWeight (double weight)
   {
       if (weight < 0 || weight > 2)
       {
           System.out.println("Invalid value for weight!");
           return;
       }
       this.weight = weight;
   }
  
   public void setPrice (double price)
   {
       if (price < 0)
       {
           System.out.println("Invalid value for price!");
           return;
       }
       this.price = price;
   }
  
   public String toString()
   {
       return "Type: " + this.type + "\nWeight: " + this.weight + " kg\nPrice: $" + this.price + "\n";
   }
  
}

2. AppleTester Class

import java.util.Scanner;

public class AppleTester
{
public static void main(String[] args)
{
   Scanner sc = new Scanner(System.in);
System.out.println("Welcome to Apple Tester!!!");

System.out.println("Creating a first Apple!");
Apple apple1 = new Apple();
System.out.println("Default values of the first apple object:");
System.out.println(apple1.toString());

System.out.println("Creating the second apple object!");
Apple apple2 = new Apple();

System.out.println("Enter the type of the second apple object:");
apple2.setType(sc.nextLine());
System.out.println("Enter the weight of the second apple object:");
apple2.setWeight (sc.nextDouble());
System.out.println("Enter the price of the second apple object:");
apple2.setPrice (sc.nextDouble());

System.out.println("Values of the second apple object:");
System.out.println(apple2.toString());

System.out.println("Creating the third apple object!");   
Apple apple3 = new Apple();

System.out.println("Enter the type of the third apple object:");
apple3.setType(sc.next());
System.out.println("Enter the weight of the third apple object:");
apple3.setWeight (sc.nextDouble());
System.out.println("Enter the price of the third apple object:");
apple3.setPrice (sc.nextDouble());


System.out.println("Printing the third apple's value which should not have changes from the default values");
System.out.println("Retrieving the third apple object's type: " + apple3.getType());
System.out.println("Retrieving the third apple object's weight: " + apple3.getWeight() + " kg");
System.out.println("Retrieving the third apple object's price: $" + apple3.getPrice());

sc.close();
}
}

Note:

There is a mistake in the sample output as below:

Enter the price of the third apple object:
­2.22
Invalid value for price!

Here the value 2.22 cannot be an invalid price because the price should be a nonnegative decimal number as per the given question. Assuming the price value given for the third object as -2.22, I have generated the code.

Below is the execution output:

Please comment for any clarifications. Thanks