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Return the contained value, if present, otherwise throw an exception to be
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A class for turning a byte stream into a character stream. Data read from the
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A connection to a URL for reading or writing. For HTTP connections, see
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Calendar is an abstract base class for converting between a Date object and a
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A counting semaphore. Conceptually, a semaphore maintains a set of permits. Each
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The Modifier class provides static methods and constants to decode class and
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A filter is an object that performs filtering tasks on either the request to a
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