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 Rockst...