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Return the contained value, if present, otherwise throw an exception to be
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A specialized Reader that reads from a file in the file system. All read
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Represents a command that can be executed. Often used to run code in a different
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A concrete subclass of NumberFormat that formats decimal numbers. It has a
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Formats and parses dates in a locale-sensitive manner. Formatting turns a Date
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A linear collection that supports element insertion and removal at both ends.
The name deque is shor
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