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/**
* Defines charsets, decoders, and encoders, for translating between
* bytes and Unicode characters.
* <table class="striped" style="margin-left:2em; text-align:left">
* <caption style="display:none">Summary of charsets, decoders, and encoders in this package</caption>
* <thead>
* <tr><th scope="col">Class name</th>
* <th scope="col">Description
* </thead>
* <tbody>
* <tr><th scope="row">{@link java.nio.charset.Charset}</th>
* <td>A named mapping between characters and bytes</td></tr>
* <tr><th scope="row">{@link java.nio.charset.CharsetDecoder}</th>
* <td>Decodes bytes into characters</td></tr>
* <tr><th scope="row">{@link java.nio.charset.CharsetEncoder}</th>
* <td>Encodes characters into bytes</td></tr>
* <tr><th scope="row">{@link java.nio.charset.CoderResult}</th>
* <td>Describes coder results</td></tr>
* <tr><th scope="row">{@link java.nio.charset.CodingErrorAction}</th>
* <td>Describes actions to take when coding errors are detected</td></tr>
* </tbody>
* </table>
* <p> A <i>charset</i> is named mapping between sequences of
* sixteen-bit Unicode characters and sequences of bytes, in the sense
* defined in <a
* href="http://www.ietf.org/rfc/rfc2278.txt"><i>RFC 2278</i></a>.
* A <i>decoder</i> is an engine which transforms bytes in a specific
* charset into characters, and an <i>encoder</i> is an engine which
* transforms characters into bytes. Encoders and decoders operate on
* byte and character buffers. They are collectively referred to as
* <i>coders</i>.
* <p> The {@link java.nio.charset.Charset} class defines methods for
* creating coders for a given charset and for retrieving the various
* names associated with a charset. It also defines static methods
* for testing whether a particular charset is supported, for locating
* charset instances by name, and for constructing a map that contains
* every charset for which support is available in the current Java
* virtual machine.
* <p> Most users will not use these classes directly; instead they
* will use the existing charset-related constructors and methods in
* the {@link java.lang.String} class, together with the existing
* {@link java.io.InputStreamReader} and {@link
* java.io.OutputStreamWriter} classes, all of whose implementations
* have been reworked to make use of the charset facilities defined in
* this package. A small number of changes have been made to the
* java.io.OutputStreamWriter} classes in order to allow explicit
* charset objects to be specified in the construction of instances of
* those classes.
* <p> Support for new charsets can be made available via the
* interface defined in the {@link
* java.nio.charset.spi.CharsetProvider} class in the {@link
* java.nio.charset.spi} package.
* <p> Unless otherwise noted, passing a {@code null} argument to a
* constructor or method in any class or interface in this package
* will cause a {@link java.lang.NullPointerException
* NullPointerException} to be thrown.
* @since 1.4
* @author Mark Reinhold
* @author JSR-51 Expert Group
package java.nio.charset;