Question

I was asked in my exam to write an algorithm on queues in Java. I used an Iterator to extract the elements of the queue. (The elements consisted of chars : 'R' or 'W' or 'B' ONLY ). The question prohibited creating or destroying any character of the input queue. I just wanted to ask whether using Iterator to extract elements “creates” characters or not?
My algorithm was:

Q=Queue
Iterator dummy=Q.elements();
while (//some condition){
   if (dummy.data=='R')
   ...
   ...   

This is just the algorithm. I wanted to ask whether I’ve “created” elements or not because I was awarded 0 marks for it. 🙁

Answer 1

There is no method on queue like elements() it is element() which Retrieves but does not remove element from the queue the correct method is queue.iterator();

Any way logically you are some what correct and you didn’t deserve 0

You can access using new for loop also

    for(Object object : queue) {
        //do something
    }