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This exception is thrown when a program attempts to create an URL from an
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The abstract base class for all number formats. This class provides the
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ArrayList is an implementation of List, backed by an array. All optional
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Calendar is an abstract base class for converting between a Date object and a
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TreeSet is an implementation of SortedSet. All optional operations (adding and
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This is the central class in the log4j package. Most logging operations, except
configuration, are d
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