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       Take a class to learn how
       By: asim roy Date: September 12, 2023, 6:44 am
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       via . Differences from enumerated entities Iterators were only
       introduced as part of the collections framework starting with
       the version of the language. Prior to this release, core
       language features included and still include entities.
       Syntactically, iterators and enumerations are identical with the
       following exceptions Iterators include an additional method
       called which removes the next element from the underlying
       collection. All collection objects must define and expose
       iterator instances.
       Not so with classes. Capability Differences Certain iterator
       instances can provide additional features and functionality
       beyond the general functionality of one-way and Phone Number
       List
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       sequential access to collection
       elements. A good example is associated with a collection of type
       and exposes the following additional functionality The ability
       to traverse forward and backward through the collection. The
       ability to insert new elements into a collection. The ability to
       access the position of a specific element in a collection.
       Concurrent Modifications One of the common sources of errors in
       programs is when code attempts to modify a collection by adding
       new elements or removing existing elements during a traversal.
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       As shown in the following example List Delete This will throw an
       error when calling the method. In this case, you can use an
       iterator to safely delete existing elements during the
       traversal. New to iterators?   to use iterators. No error
       conditions are encountered during deletion of elements using the
       iterator's method. Page Last Updated Year Month Is a language
       for adding interactivity to web pages. Before the advent of ,
       web pages were not interactive. For example, whenever you need
       to fill out a web form, you have to fill in the information, hit
       the submit button, and then wait for the web page to reload. You
       will then be informed whether the form has been accepted by the
       server.
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