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Collections With Queue And Iterators


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Collections With Queue And Iterators
What will be the output of the program?
import java.util.*;
class Test{
    public static void main(String... arg){
        Queue myList = new ArrayList();
        int [] val ={1,2,3,4,5};
        for(int i = 0; i< val.length; i++){
            myList.add(new Integer(val[i]));
        }
        System.out.println("Before traversal through an iterator:"+ myList);
        Iterator iterator = myList.iterator();
        while(iterator.hasNext()){
            Integer element = (Integer)iterator.next();
            int value = element.intValue();
            if(value>4)
            iterator.remove();
        }
        System.out.print("After traversal through an iterator:"+myList);
    }
}

A. Before traversal through an iterator:[1,2,3,4,5]
After traversal through an iterator:[1,2,3,4]
B. Before traversal through an iterator:[1,2,3]
After traversal through an iterator:[1,2,3,4]
C. The program generates compile-time error.
D. Before traversal through an iterator:[1,2,3,4]
After traversal through an iterator:[1,2,3,4]
E. The program compiles successfully, but it gives run-time error.
Topic: Java Iterator

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User comments below. All of them might not be correct.

answer is C :compilation erroras ArrayList cant be implicitly coverted to Queue diresctly

Posted by Pramod Jain    2013-07-09 12:31:29


c is answer due to incompatible types QUueue and ArrayList

Posted by Karteek Paruchuri    2013-07-09 12:32:51


C it is as queue objects cant be created using Arraylist bt r usually done using Linkedlists...

Posted by Shaik Nyamath    2013-07-09 12:41:12


C

Posted by Ram Reddy Bitla    2013-07-09 23:41:21


Congratulations Pramod Jain. You are this dose winner. Please send us your mobile details and we will process the recharge asap.

Posted by Merit Campus    2013-07-10 05:58:27


thank u mc.. got rc :)

Posted by Pramod Jain    2013-07-21 14:52:24


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