wriote starter main application

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

@@ -1,7 +1,25 @@
 package io.zipcoder.polymorphism;
-
+import java.util.*;
 /**
  * Created by leon on 11/6/17.
  */
 public class MainApplication {
+
+    public static void main(String[] args) {
+    Scanner scn = new Scanner(System.in);
+    StringBuilder sb = new StringBuilder();
+    System.out.println("Hey there! How many pets do you have?");
+    int petNum = scn.nextInt();
+    System.out.println("That's cool. What's your first pet's name?");
+    String petName = scn.nextLine();
+    for (int i=1; i<=petNum; i++) {
+        petName = scn.nextLine();
+        sb.append(petName);
+
+        if (i<petNum){System.out.println("Aww! What's your next pet's name?");
+            sb.append(", ");}
+    }
+System.out.println("I like those pet names: ");
+System.out.print(sb.toString());
+}
 }

src/test/java/io/zipcoder/polymorphism/MainApplicationTest.java

@@ -1,5 +1,6 @@
 package io.zipcoder.polymorphism;
 
+
 /**
  * Created by leon on 11/6/17.
  */

src/test/java/io/zipcoder/polymorphism/Pet.java

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