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An output stream that writes bytes to a file. If the output file exists, it can
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A Comparator is used to compare two objects to determine their ordering with
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GregorianCalendar is a concrete subclass of Calendarand provides the standard
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HashSet is an implementation of a Set. All optional operations (adding and
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A parser that parses a text string of primitive types and strings with the help
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Is the value null?
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