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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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/**
* Defines charsets, decoders, and encoders, for translating between
* bytes and Unicode characters.
*
* <blockquote><table cellspacing=1 cellpadding=0 summary="Summary of charsets, decoders, and encoders in this package">
* <tr><th align="left">Class name</th><th align="left">Description</th></tr>
* <tr><td valign=top>{@link java.nio.charset.Charset}</td>
* <td>A named mapping between characters<br>and bytes</td></tr>
* <tr><td valign=top>{@link java.nio.charset.CharsetDecoder}</td>
* <td>Decodes bytes into characters</td></tr>
* <tr><td valign=top>{@link java.nio.charset.CharsetEncoder}&nbsp;&nbsp;</td>
* <td>Encodes characters into bytes</td></tr>
* <tr><td valign=top>{@link java.nio.charset.CoderResult}&nbsp;&nbsp;</td>
* <td>Describes coder results</td></tr>
* <tr><td valign=top>{@link java.nio.charset.CodingErrorAction}&nbsp;&nbsp;</td>
* <td>Describes actions to take when<br>coding errors are detected</td></tr>
*
* </table></blockquote>
*
* <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&nbsp;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
* {@link java.io.InputStreamReader} and {@link
* 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;