Implement a class according to its UML class symbol: Product -name: String -pric

Question

Implement a class according to its UML class symbol: Product -name: String -price: double -scanCode: int -numObjects: int = 0 +Product (String, double) +getName(): String +getScanCode: int +getPrice(): double +changePrice (double): void +getNumObjects(): int +getNumberInstock(): int The constructor shall take two parameters to initialise the name and price fields. The variable numObjects shall be incremented by the constructor every time a new object is instattiated. The scanCode is a 4-digit integer value 1000 +numObjects initialised by the constructor. Test the defined class with the following program: class TestProduct {public static void main (String[] args) {System.out.println ("There are " + Product.getNumberInStock() + "items"); Product pr1 = new Product ("Computer", 1500.0); System.out.println ("There are" + Product.getNumberInstock() + "items"); Product pr2 = new Product ("Printer", 600.0); Product pr3 = new Product ("Monitor", 240.0); System.out.println ("There are" + Product.getNumberInstock() + "items");

Explanation / Answer

TestProduct.java

public class TestProduct {

  
   public static void main(String[] args) {
       System.out.println("There are "+Product.getNumberInStock()+" items");
       Product pr1 = new Product("Computer", 1500.0);
       System.out.println("There are "+Product.getNumberInStock()+" items");
       Product pr2 = new Product("Printer", 600.0);
       Product pr3 = new Product("Monitor", 240.0);
       System.out.println("There are "+Product.getNumberInStock()+" items");

   }

}

Product.java

public class Product {
   private String name;
   private double price;
   private int scanCode;
   private static int numObjects = 0;
   public Product(String name, double price) {
       this.name = name;
       this.price = price;
       numObjects++;
   }
   public String getName() {
       return name;
   }
   public int getScanCode() {
       return scanCode;
   }
   public int getNumObjects() {
       return numObjects;
   }
   public void changePrice(double p){
       price = p;
   }
   public double getPrice() {
       return price;
   }
   public static int getNumberInStock() {
       return numObjects;
   }
}

Output:

There are 0 items
There are 1 items
There are 3 items

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