Finished for if loop for pets array

src/main/java/io/zipcoder/polymorphism/MainApplication.java

 
         int numOfPets = keyboard.nextInt();
         // Create array of objects [numOfPets]
+        if (numOfPets > 0) {
+            Pet[] pets = new Pet[numOfPets];
 
-        Pet[] pets = new Pet[numOfPets];
+            // What kind of pet each one is using a loop
+            for (int i = 0; i < pets.length; i++) {
+                System.out.print("What kind of pet do you have?\n\n");
+                System.out.print("1: Dog\n2: Cat\n3: Duck\n4: Frog\n(Enter the key for the pet)\n");
+                int petType = keyboard.nextInt();
+                // Takes in the type and creates that object
 
-        // What kind of pet each one is using a loop
-        for (int i = 0; i < pets.length; i++) {
-            System.out.print("What kind of pet do you have?\n\n");
-            System.out.print("1: Dog\n2: Cat\n3: Duck\n4: Frog\n(Enter the key for the pet)\n");
-            int petType = keyboard.nextInt();
-            // Takes in the type and creates that object
+                if (petType == 1) {
+                    pets[i] = new Dog();
+                    System.out.print("What is your dog's name?\n");
+                    String petName = keyboard.next();
+                    System.out.println("Pet Name: " + petName);
+                    pets[i].setName(petName);
 
-            if (petType == 1) {
-                pets[i] = new Dog();
-                System.out.print("What is your dog's name?\n");
-                String petName = keyboard.next();
-                System.out.println("Pet Name: " + petName);
-                pets[i].setName(petName);
+                } else if (petType == 2) {
+                    pets[i] = new Cat();
+                    System.out.print("What is your cat's name?\n");
+                    String petName = keyboard.next();
+                    pets[i].setName(petName);
 
-            } else if (petType == 2) {
-                pets[i] = new Cat();
-                System.out.print("What is your cat's name?\n");
-                String petName = keyboard.next();
-                pets[i].setName(petName);
+                } else if (petType == 3) {
+                    pets[i] = new Duck();
+                    System.out.print("What is your duck's name?\n");
+                    String petName = keyboard.next();
+                    pets[i].setName(petName);
 
-            } else if (petType == 3) {
-                pets[i] = new Duck();
-                System.out.print("What is your duck's name?\n");
-                String petName = keyboard.next();
-                pets[i].setName(petName);
-
-            } else if (petType == 4) {
-                pets[i] = new Frog();
-                System.out.print("What is your frog's name?\n");
-                String petName = keyboard.next();
-                pets[i].setName(petName);
+                } else if (petType == 4) {
+                    pets[i] = new Frog();
+                    System.out.print("What is your frog's name?\n");
+                    String petName = keyboard.next();
+                    pets[i].setName(petName);
+                }
             }
-        }
-        for (int i = 0; i < pets.length; i++) {
-
+            for (int i = 0; i < pets.length; i++) {
+                System.out.print((i + 1) + ": " + pets[i].getName() + " says, \"" + pets[i].speak() + "\"\n");
+            }
+        } else {
+            System.out.print("Invalid input. Exiting program.");
+            System.exit(1);
         }
         // Ask what kind of pet
         // Option menu for types of pets.