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An output stream that writes bytes to a file. If the output file exists, it can
be replaced or appen
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A charset is a named mapping between Unicode characters and byte sequences.
Every Charset can decode
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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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Defines methods that all servlets must implement. A servlet is a small Java
program that runs within
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General IO stream manipulation utilities. This class provides static utility
methods for input/outpu
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