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Return the contained value, if present, otherwise throw an exception to be
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Return the original filename in the client's filesystem.This may contain path
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A concrete subclass of NumberFormat that formats decimal numbers. It has a
variety of features desig
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HashSet is an implementation of a Set. All optional operations (adding and
removing) are supported.
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A Map is a data structure consisting of a set of keys and values in which each
key is mapped to a si
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A map that has its keys ordered. The sorting is according to either the natural
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General file manipulation utilities. Facilities are provided in the following
areas: * writing to a
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This is the central class in the log4j package. Most logging operations, except
configuration, are d
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