Java Iterator class can help you to iterate through every element in a collection - Hacker Rank Solution.

 Java Iterator class can help you to iterate through every element in a collection. Here is a simple example:

import java.util.*;
public class Example{

    public static void main(String []args){
        ArrayList mylist = new ArrayList();
        mylist.add("Hello");
        mylist.add("Java");
        mylist.add("4");
        Iterator it = mylist.iterator();
        while(it.hasNext()){
            Object element = it.next();
            System.out.println((String)element);
        }
    }
}

In this problem you need to complete a method func. The method takes an ArrayList as input. In that ArrayList there is one or more integer numbers, then there is a special string "###", after that there are one or more other strings. A sample ArrayList may look like this:

element[0]=>42
element[1]=>10
element[2]=>"###"
element[3]=>"Hello"
element[4]=>"Java"

You have to modify the func method by editing at most 2 lines so that the code only prints the elements after the special string "###". For the sample above the output will be:

Hello
Java

Note: The stdin doesn't contain the string "###", it is added in the main method.

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SOLUTION :-

import java.io.*;

import java.util.*;

public class Solution {

     public static void func(ArrayList<String> mylist) {

        Iterator<String> it = mylist.iterator();

       

        // Skip elements until we reach "###"

        while (it.hasNext()) {

            String element = it.next();

            if (element.equals("###")) {

                break; // Stop when we reach "###"

            }

        }

        // Print the remaining elements (after "###")

        while (it.hasNext()) {

            System.out.println(it.next()); // Print directly without modification

        }

    }

    public static void main(String[] args) {

        ArrayList<String> mylist = new ArrayList<>();

        mylist.add("2");

        mylist.add("2");

        mylist.add("42");

        mylist.add("10");

        mylist.add("###");

        mylist.add("hello");

        mylist.add("java");

        func(mylist); // Calling the method

    }

}