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ObjectMapper provides functionality for reading and writing JSON, either to and
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Wraps either an existing OutputStream or an existing Writerand provides
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Formats or parses dates and times.This class provides factories for obtaining
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This class consists exclusively of static methods that operate on or return
collections. It contains
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A map that has its keys ordered. The sorting is according to either the natural
ordering of its keys
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This is the central class in the log4j package. Most logging operations, except
configuration, are d
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