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       #Post#: 26--------------------------------------------------
        Once you have a reference
       By: asim roy Date: September 12, 2023, 6:40 am
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       This is done manually in the class's method in the application.
       Iterators in provide a way to access the elements of a
       collection one by one in a sequential, one-way, and
       non-repeatable manner. This is useful when the size of the
       collection is not known in advance or when the collection does
       not expose suitable methods to access the elements contained at
       specific positions. Iterators form part of the core
       implementation and are defined as derived classes from the
       Iterator entities present in the package. Collection iterators
       have the following properties Order Use an iterator to retrieve
       elements in the order they appear in the collection. One-way The
       iterator can only proceed in one direction, usually left to
       right.
       However, some derivatives of iterators such as  allow movement
       in both directions. Non-repeatable Once the traversal is
       complete, the same iterator cannot be used Phone Number List
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       again to repeat the loop, so a new
       iterator instance needs to be obtained to repeat the process.
       Learn advanced definitions and usage using the tutorials on
       Iterables It is common practice to define an iterator as an
       interface with a common set of methods. The following code
       snippet describes a common way to get an iterator for a given
       collection Popular Courses Certain collection objects, such as ,
       etc.
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       Iterator All classes that implement the interface must also
       provide a corresponding implementation of the interface that can
       be accessed using the method. By following the principle of
       encapsulation, the exact semantics of iterators for a given
       collection are hidden from the user.  to an iterator instance of
       a collection, you can use it to browse the elements in the
       collection, as shown in the following code Object Element
       Methods Summary The above example reveals the two most important
       methods of the iterator interface Boolean Value Internally, each
       iterator instance maintains a pointer to the element in the
       collection.
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