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An iterator over a sequence of objects, such as a collection.If a collection has
been changed since
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Thrown when trying to retrieve an element past the end of an Enumeration or
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A Set is a data structure which does not allow duplicate elements.
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Factory and utility methods for Executor, ExecutorService,
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Patterns are compiled regular expressions. In many cases, convenience methods
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An interface for the creation of Connection objects which represent a connection
to a database. This
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