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Return the contained value, if present, otherwise throw an exception to be
created by the provided s
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A specialized Writer that writes to a file in the file system. All write
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A class which can consume and produce dates in SQL Date format. Dates are
represented in SQL as yyyy
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A parser that parses a text string of primitive types and strings with the help
of regular expressio
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An object that executes submitted Runnable tasks. This interface provides a way
of decoupling task s
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This is the central class in the log4j package. Most logging operations, except
configuration, are d
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