Java Iterator question

[Maximilian]

Iterator<Integer> anIterator = aSet.iterator();

Integer value1;
Integer value2;
Integer value3;

While (anIterator.hasNext())
{
value1 = anIterator.next();
value2 = anIterator.next();
value3 = anIterator.next();
}

Assuming that aSet has a total of 3 Integer elements am I correct in assuming that the while loop will only execute once? If it contained 6 elements the loop would execute twice yes?

Also would there be an infinite loop if the while loop had no .next() in it?

 

[BrightCandle]

Correct on first 2 questions. Affirmative on the third, it would indeed loop forever without a call to next as the state wont change without it. Bare in mind if your set had 1 or 2 elements the code above would throw an exception on the next calls that are unguarded by the hasNext.

 

[Leros]

Your code is safe if you can absolutely guarantee that there will always be a multiple of 3 items in your set. If not, you need to handle the case where it does not.

 

[Ken g6]

Your code is safe if you can absolutely guarantee that there will always be a multiple of 3 items in your set. If not, you need to handle the case where it does not.

One way would be to catch a NoSuchElementException.