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Return the contained value, if present, otherwise throw an exception to be
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ObjectMapper provides functionality for reading and writing JSON, either to and
from basic POJOs (Pl
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A connection to a URL for reading or writing. For HTTP connections, see
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A controller for the selection of SelectableChannel objects. Selectable channels
can be registered w
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Calendar is an abstract base class for converting between a Date object and a
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A synchronization aid that allows one or more threads to wait until a set of
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General IO stream manipulation utilities. This class provides static utility
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