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This class generates cryptographically secure pseudo-random numbers. It is best
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GregorianCalendar is a concrete subclass of Calendarand provides the standard
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An iterator over a sequence of objects, such as a collection.If a collection has
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A collection designed for holding elements prior to processing. Besides basic
java.util.Collection o
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Is the value null?
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A point representing a location in (x,y) coordinate space, specified in integer
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