Java Instanceof keyword For Explanation Watch Video: Sample Input 5 Student Student Rockstar Student Hacker Sample Output 3 1 1 Note: Run in java 7 Version import java.util.*; class Student{} class Rockstar{ } class Hacker{} public class InstanceOFTutorial{ static String count(ArrayList mylist){ int a = 0 ,b = 0 ,c = 0 ; for ( int i = 0 ; i < mylist.size(); i++){ Object element=mylist.get(i); if (element instanceof Student) a++; if (element instanceof Rockstar) b++; if (element instanceof Hacker) c++; } String ret = Integer.toString(a)+ " " + Integer.toString(b)+ " " + Integer.toString(c); return ret; } public static void main(String []args){ ArrayList mylist = new ArrayList(); Scanner sc = new Scanner(System.in); int t = sc.nextInt(); for ( int i= 0 ; i<t; i++){ Strin