Java Iterator

Problem Statement

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

import java.util.*;

public class Example

{

    public static void main(String []argh)

    {

        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 function func. The function 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 function 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

To restore the original code in the editor, click the top left icon on the editor and create a new buffer.

import java.util.*;

public class Main

{

   static Iterator func(ArrayList mylist)

   {

      Iterator it=mylist.iterator();

      while(it.hasNext())

      {

         Object element = it.next();//~~Complete this~~

         if(element instanceof String)//Hints: use instanceof operator

            break;

      }

      return it;

     

   }

   public static void main(String []argh)

   {

      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);

      }

     

   }

}

·         Testcase 0

Congratulations, you passed this test case!

Score: 1

Compile Time

Compile Message

Note: Main.java uses unchecked or unsafe operations.

Note: Recompile with -Xlint:unchecked for details.

Run Time

Input (stdin)

2 2

42

10

hello

java

Your Output (stdout)

hello

java

Expected Output

hello