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ObjectMapper provides functionality for reading and writing JSON, either to and
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Calendar is an abstract base class for converting between a Date object and a
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Locale represents a language/country/variant combination. Locales are used to
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Vector is an implementation of List, backed by an array and synchronized. All
optional operations in
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Patterns are compiled regular expressions. In many cases, convenience methods
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Defines a general exception a servlet can throw when it encounters difficulty.
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