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The base class for all formats. This is an abstract base class which specifies
the protocol for clas
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This class contains various methods for manipulating arrays (such as sorting and
searching). This cl
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Calendar is an abstract base class for converting between a Date object and a
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A Set is a data structure which does not allow duplicate elements.
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TreeSet is an implementation of SortedSet. All optional operations (adding and
removing) are support
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This is the central class in the log4j package. Most logging operations, except
configuration, are d
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