Review

Misses to check that there is another element before calling Iterator.next().

Check iterator.hasNext() or ensure size of the collection (check size(), isEmpty() or add() an element).

• missing/condition/value_or_state

mubench/examples/survey/OnlyNext.java

misuse(Collection)

class OnlyNext {
  public Object misuse(Collection<Object> os) {
		Iterator<Object> itr = os.iterator();
		return itr.next();
	}

}

public class HasNext {
	void pattern(Collection<Object> os) {
		Iterator<Object> itr = os.iterator();
		if (itr.hasNext()) {
      itr.next();
    }
	}
}