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Return the contained value, if present, otherwise throw an exception to be
created by the provided s
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A specialized Writer that writes to a file in the file system. All write
requests made by calling me
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This SocketException may be thrown during socket creation or setting options,
and is the superclass
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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 counting semaphore. Conceptually, a semaphore maintains a set of permits. Each
#acquire blocks if
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An interface for the creation of Connection objects which represent a connection
to a database. This
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