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- Format (java.text)
The base class for all formats. This is an abstract base class which specifies
the protocol for clas
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GregorianCalendar is a concrete subclass of Calendarand provides the standard
calendar used by most
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HashSet is an implementation of a Set. All optional operations (adding and
removing) are supported.
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A Properties object is a Hashtable where the keys and values must be Strings.
Each property can have
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TreeSet is an implementation of SortedSet. All optional operations (adding and
removing) are support
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