add dog, cat and hampster classes

src/main/java/io/zipcoder/Application.java

@@ -1,5 +1,36 @@
 package io.zipcoder;
 
 
+import java.util.ArrayList;
+import java.util.Scanner;
+
 public class Application {
+
+    public static void main(String[] args) {
+        String petType, petName;
+        ArrayList<Pet> petArrayList = new ArrayList<Pet>();
+        Scanner scanner = new Scanner(System.in);
+        System.out.println("How many pets do you have?");
+        int numberOfPets = scanner.nextInt();
+
+        for(int i = 1; i <= numberOfPets; i++) {
+            System.out.println("What kind of pet?");
+            petType = scanner.next();
+            System.out.println("Enter pet's name.");
+            petName = scanner.next();
+            if ("dog".equals(petType.toLowerCase())) {
+                petArrayList.add(new Dog(petType, petName));
+            } else if ("cat".equals(petType.toLowerCase())) {
+                petArrayList.add(new Cat(petType, petName));
+            } else if ("hampster".equals(petType.toLowerCase())) {
+                petArrayList.add(new Hampster(petType, petName));
+            }
+        }
+        for (Pet petObj : petArrayList) {
+            System.out.println(petObj.getName() + " " + petObj.speak());
+
+        }
+    }
+}
+
 }

src/main/java/io/zipcoder/Cat.java

@@ -0,0 +1,4 @@
+package io.zipcoder;
+
+public class Cat {
+}

src/main/java/io/zipcoder/Dog.java

@@ -0,0 +1,4 @@
+package io.zipcoder;
+
+public class Dog {
+}

src/main/java/io/zipcoder/Hampster.java

@@ -0,0 +1,4 @@
+package io.zipcoder;
+
+public class Hampster {
+}