When I obtain iterator over an ArrayList and use the method next() on it, does it return only next element or it return and remove elements from the iterator. like
Iterator i = list.iterator();
while(i.hasNext())
System.out.print(i.next()+" ");
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Don't worry, remove() remove. – Marco Acierno Jan 09 '14 at 14:03
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Maybe after the iteration? not during the iiteration. Can you answer this "mini" question? – Marco Acierno Jan 09 '14 at 14:05
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Yes, after iteration i.hasNext() return false – Scorpion Jan 09 '14 at 14:06
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Use ArrayList in an enhanced for loop, see here http://stackoverflow.com/questions/11685305/what-is-the-syntax-of-enhanced-for-loop-in-java – gyorgyabraham Jan 09 '14 at 15:01
1 Answers
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Calling next() just moves a pointer to the next element
and returns the element. It does not remove any elements.
For more details see here.
http://en.wikipedia.org/wiki/Iterator#Java
http://docs.oracle.com/javase/7/docs/api/java/util/Iterator.html
Iterators also have a remove() method. That method removes elements.
peter.petrov
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