Java Iterator.java

import java.util.*;
public class Main{
	
 static Iterator func(ArrayList mylist){
 Iterator it=mylist.iterator();
 while(it.hasNext()){
 Object element =it.next();
 if(element instanceof String)//Hints: use instanceof 

			break;
		}
 return it;
 
 }
 @SuppressWarnings({ "unchecked" })
 public static void main(String []args){
 ArrayList mylist = new ArrayList();
 Scanner sc = new Scanner(System.in);
 int n = sc.nextInt();
 int m = sc.nextInt();
 for(int i = 0;i<n;i++){
 mylist.add(sc.nextInt());
 }
 
 mylist.add("###");
 for(int i=0;i<m;i++){
 mylist.add(sc.next());
 }
 
 Iterator it=func(mylist);
 while(it.hasNext()){
 Object element = it.next();
 System.out.println((String)element);
 }
 }
}