Create InstanceOfKeyword.java

Author: AD9000

Object Oriented Programming/InstanceOfKeyword.java

@@ -0,0 +1,14 @@
+// Author: Atharv Damle
+// Code to demonstrate use of instanceof keyword.
+// Full Question: https://www.hackerrank.com/challenges/java-instanceof-keyword/problem
+
+// a instanceof b checks if 'a' is a subclass of 'b'. Returns true if yes otherwise false. 
+// Since the instance of any class is inherited from Java Object, element acts as a sort of generic data type 
+// which can be instanciated by any class.
+Object element=mylist.get(i);
+if(element instanceof Student)
+  a++;
+else if(element instanceof Rockstar)
+  b++;
+else if(element instanceof Hacker)
+  c++;