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Return the contained value, if present, otherwise throw an exception to be
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Return the original filename in the client's filesystem.This may contain path
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Wraps either an existing OutputStream or an existing Writerand provides
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A buffer for bytes. A byte buffer can be created in either one of the following
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* #allocate
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Calendar is an abstract base class for converting between a Date object and a
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A Set is a data structure which does not allow duplicate elements.
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An Executor that provides methods to manage termination and methods that can
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