Iterator iterates over collection

Iterator iterates over collection

The order in which the `Iterator` iterates over a collection depends on the specific implementation of the collection. Different types of collections may have different iteration orders. However, in general, the iteration order is typically consistent with the order in which elements were inserted into the collection, especially for ordered collections like `ArrayList` or `LinkedList`.

Iterator iterates over collection

For example:

  • ArrayList: The `Iterator` typically iterates over elements in the same order they were added to the list.
  • LinkedList: Similarly, the `Iterator` iterates over elements in the order they were added to the list.
  • HashSet: For a `HashSet`, which does not guarantee the order of its elements, the iteration order may not be predictable. It depends on the internal implementation of the `HashSet`.
  • LinkedHashSet: Unlike `HashSet`, a `LinkedHashSet` maintains the order of elements in which they were inserted, so the `Iterator` will iterate over elements in the same order.
  • TreeSet: For a `TreeSet`, the `Iterator` iterates over elements in sorted order according to their natural ordering or a custom comparator.

In summary, the iteration order of a collection depends on its specific implementation and whether it maintains the insertion order or follows a particular sorting order. It’s essential to consult the documentation of the specific collection implementation to understand its iteration behavior.