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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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A reentrant mutual exclusion Lock with the same basic behavior and semantics as
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Operations on java.lang.String that arenull safe.
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The LoggerFactory is a utility class producing Loggers for various logging APIs,
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