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Return the contained value, if present, otherwise throw an exception to be
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Wraps an existing Writer and buffers the output. Expensive interaction with the
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Wraps either an existing OutputStream or an existing Writerand provides
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Uses a one-way hash function to turn an arbitrary number of bytes into a
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A concrete subclass of NumberFormat that formats decimal numbers. It has a
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This class contains various methods for manipulating arrays (such as sorting and
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Calendar is an abstract base class for converting between a Date object and a
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