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This class consists exclusively of static methods that operate on or return
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A specific moment in time, with millisecond precision. Values typically come
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GregorianCalendar is a concrete subclass of Calendarand provides the standard
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This class provides methods that return pseudo-random values.It is dangerous to
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Walk the nodes of the tree left-to-right or right-to-left. Note that in
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This is the central class in the log4j package. Most logging operations, except
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