Added comments in the code. modified index.md

value-object/src/main/java/com/iluwatar/value/object/App.java

@@ -1,12 +1,19 @@
 package com.iluwatar.value.object;
 
 /**
- * Hello world!.
+ * App Class.
  *
  */
 public class App {
+  /**
+   * main method.
+   */
   public static void main(String[] args) {
-    HeroStat stat = HeroStat.valueOf(10, 5, 0);
-    System.out.println(stat.toString());
+    HeroStat statA = HeroStat.valueOf(10, 5, 0);
+    HeroStat statB = HeroStat.valueOf(5, 1, 8);
+
+    System.out.println(statA.toString());
+    // When using Value Objects do not use ==, only compare using equals().
+    System.out.println("is statA and statB equal : " + statA.equals(statB));
   }
 }