Available on all platforms
Iterator is a structure that permits iteration over elements of type
Any class with matching
next() fields is considered an
and can then be used e.g. in
for-loops. This makes it easy to implement
Returns the current item of the `Iterator` and advances to the next one. This method is not required to check `hasNext()` first. A call to this method while `hasNext()` is `false` yields unspecified behavior. On the other hand, iterators should not require a call to `hasNext()` before the first call to `next()` if an element is available.