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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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TreeSet is an implementation of SortedSet. All optional operations (adding and
removing) are support
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The Color class is used to encapsulate colors in the default sRGB color space or
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A Rectangle specifies an area in a coordinate space that is enclosed by the
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