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Return the contained value, if present, otherwise throw an exception to be
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ObjectMapper provides functionality for reading and writing JSON, either to and
from basic POJOs (Pl
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An "abstract" representation of a file system entity identified by a pathname.
The pathname may be a
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A synchronization aid that allows one or more threads to wait until a set of
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Provides an abstract class to be subclassed to create an HTTP servlet suitable
for a Web site. A sub
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This is the central class in the log4j package. Most logging operations, except
configuration, are d
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Defines the contract between a returned instance and the runtime when an
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