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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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GregorianCalendar is a concrete subclass of Calendarand provides the standard
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UUID is an immutable representation of a 128-bit universally unique identifier
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General file manipulation utilities. Facilities are provided in the following
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Factory that creates instances of DateTimeFormatter from patterns and styles.
Datetime formatting i
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A flow layout arranges components in a left-to-right flow, much like lines of
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