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Provides a client-side TCP socket.
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Calendar is an abstract base class for converting between a Date object and a
set of integer fields
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A Comparator is used to compare two objects to determine their ordering with
respect to each other.
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A legacy iteration interface.New code should use Iterator instead. Iterator
replaces the enumeration
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A map that has its keys ordered. The sorting is according to either the natural
ordering of its keys
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Factory for creating Log instances, with discovery and configuration features
similar to that employ
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