Discussion
What will be the output of the program?
import java.util.*;
public class Item70
{
public static void main(String[] args)
{
Iterator<String> it = new ArrayList<String>(
Arrays.asList("a", "b")).iterator();
it.next();
it.remove();
it.remove();
}
}
Answer: B
remove deletes the element the iterator last returned, so it may be called at most once per call to next. The second remove has nothing to delete and throws IllegalStateException. Calling remove before any next fails the same way.
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