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HashSet is an implementation of a Set. All optional operations (adding and
removing) are supported.
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A Properties object is a Hashtable where the keys and values must be Strings.
Each property can have
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TreeSet is an implementation of SortedSet. All optional operations (adding and
removing) are support
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Extends the javax.servlet.ServletRequest interface to provide request
information for HTTP servlets.
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General IO stream manipulation utilities. This class provides static utility
methods for input/outpu
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