ClassName combined = new ClassName(param1, param2)

Week 4: Writing classes/13B. Calculate products together

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+The program defines the class Product.
+
+Write the method
+public static Product calculate(Product product1, Product product2)
+
+which takes two products as parameters.
+
+The method creates and returns a new product in which the names of the products received as parameters 
+are combined with the 'and' word 
+and the quantities are added together.
+
+
+
+Example of calling the method:
+public static void main(String[] args) {
+    Product carrot = new Product("Carrot", 5);
+    Product potato = new Product("Potato", 7);
+    
+    Product combined = calculate(carrot, potato);
+    System.out.println(combined.getName());
+    System.out.println(combined.getAmount());
+}
+
+
+
+Program outputs:
+Carrot and Potato
+12
+
+
+
+
+
+
+
+
+
+============================
+
+
+import java.util.Random;
+
+public class Test{
+    public static void main(String[] args){
+        final Random r = new Random();
+        
+        
+         String[] products = {"Blueberry", "Strawberry", "Raspberry", "Grape",
+                             "Lingonberry", "Cranberry", "Currant"};
+        
+        for (int test=0; test<3; test++) {
+            String t1 = products[r.nextInt(products.length)];
+            String t2 = t1;
+            while (t1.equals(t2)) {
+                t2 = products[r.nextInt(products.length)];
+            }
+            
+            Product product1 = new Product(t1, r.nextInt(20) + 1);
+            Product product2 = new Product(t2, r.nextInt(20) + 1);
+            
+            System.out.println("Product 1: " + product1);
+            System.out.println("Product 2: " + product2);
+            
+            Product product3 = calculate(product1, product2);
+            System.out.println("Names of the berries: " + product3.getName());
+            System.out.println("Combined quantity: " + product3.getAmount());
+            System.out.println("");
+            
+        }
+    }
+
+
+    //ADD HERE
+    // inside 'Test' class, outside 'main' method
+    public static Product calculate(Product product1, Product product2) {
+        Product combined = new Product(product1.getName() + " and " + product2.getName(),
+                                       product1.getAmount() + product2.getAmount());
+        return combined;
+    }
+
+
+}
+
+
+
+
+class Product {
+    private String name;
+    private int amount;
+    
+    public Product(String name, int amount) {
+        this.name = name;
+        this.amount = amount;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public int getAmount() {
+        return amount;
+    }
+
+    @Override
+    public String toString() {
+        return "Product (name=" + name + ", amount=" + amount + ")";
+    }  
+}
+
+
+
+
+
+Product 1: Product (name=Raspberry, amount=7)
+Product 2: Product (name=Grape, amount=19)
+Names of the berries: Raspberry and Grape
+Combined quantity: 26
+
+Product 1: Product (name=Blueberry, amount=20)
+Product 2: Product (name=Grape, amount=5)
+Names of the berries: Blueberry and Grape
+Combined quantity: 25
+
+Product 1: Product (name=Blueberry, amount=20)
+Product 2: Product (name=Strawberry, amount=12)
+Names of the berries: Blueberry and Strawberry
+Combined quantity: 32
+
+