Question

Java

Part 2 of 4 - Amusement Park Programming Project

MUST BE COMPATIBLE WITH PART 1

https://www.chegg.com/homework-help/questions-and-answers/java-part-1-4-amusement-park-programming-project-requirements-use-java-selection-construct-q40170145?trackid=ERIFssNL

Requirements:

1. Use the Java selection constructs (if and if else).
2. Use the Java iteration constructs (while, do, for).
3. Use Boolean variables and expressions to control iterations.
4. Proper error handling.

Class:

Merchandise – models merchandise available in the gift shop such as t-shirts, sweatshirts, and stuffed animals.

Instance Fields:

1. id : long – to identify the specific merchandise item.
2. category : String – to store the specific type of merchandise.
3. description : String – to store the description of the merchandise.
4. price : double – to store the price of the merchandise.
5. inStock : boolean – to indicate if the merchandise is instock or on-order.

Constructors and Methods:

1. Merchandise(String, String, String, double, boolean) – parameterized constructor that initializes the attributes of a merchandise item.
2. setPrice(double) – to change the price of the merchandise.
3. getInstock() : boolean – to change the status of the merchandise item.
4. getId() : String – Accessor method for instance field.
5. getCategory() : String – Accessor method for instance field.
6. getDescription() : String – Accessor method for instance field.
7. getPrice() : double – Accessor method for instance field.
8. toString() : String – to return a neatly formatted string that contains all the information stored in the instance fields.

Answer 1

If you have any problem with the code feel free to comment.

Program

class Merchandise {
   //instance variables of the class
   private long id;
   private String category, description;
   private double price;
   private boolean inStock;
  
   //parameterzied constructor
   public Merchandise(long id, String category, String description, double price, boolean inStock) {
       this.id = id;
       this.category = category;
       this.description = description;
       this.inStock = inStock;
       //error checking
       //price cannot be a negetive number
       if(price <0) {
           System.err.println("Price cannot be a negetive, default set it to zero");
           this.price = 0;
       }
       else
           this.price = price;
   }
   //setting price
   public void setPrice(double price) {
       if(price <0) {
           System.err.println("Price cannot be a negetive, default set it to zero");
           this.price = 0;
       }
       else
           this.price = price;
   }
  
   //all the getters
   public long getId() {
       return id;
   }

   public String getCategory() {
       return category;
   }

   public String getDescription() {
       return description;
   }

   public double getPrice() {
       return price;
   }

   public boolean isInStock() {
       return inStock;
   }
  
   @Override//detailed description of the object
   public String toString() {
       String str1, str2, str3, str4, str5;
       str1 = "\nID: "+id+"\n";
       str2 = "Category: "+category+"\n";
       str3 = "Description: "+description+"\n";
       str4 = "Price: $"+price+"\n";
       str5 = "Is in Stock? "+inStock+"\n";
       return str1+str2+str3+str4+str5;
   }
  
}

public class Test {//driver class for testing
   public static void main(String[] args) {
       Merchandise obj = new Merchandise(12145741, "Toys", "Its the Hotwheels Batmobile", 50.23, true);
       System.out.println(obj);
   }
}

Output