    001    /*
    002     * Copyright (C) 2007 The Guava Authors
    003     *
    004     * Licensed under the Apache License, Version 2.0 (the "License");
    005     * you may not use this file except in compliance with the License.
    006     * You may obtain a copy of the License at
    007     *
    008     * http://www.apache.org/licenses/LICENSE-2.0
    009     *
    010     * Unless required by applicable law or agreed to in writing, software
    011     * distributed under the License is distributed on an "AS IS" BASIS,
    012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    013     * See the License for the specific language governing permissions and
    014     * limitations under the License.
    015     */
    016
    017    package com.google.common.base;
    018
    019    import java.nio.charset.Charset;
    020
    021    /**
    022     * Contains constant definitions for the six standard {@link Charset} instances, which are
    023     * guaranteed to be supported by all Java platform implementations.
    024     *
    025     * @author Mike Bostock
    026     * @since 1.0
    027     */
    028    public final class Charsets {
    029      private Charsets() {}
    030
    031      /**
    032       * US-ASCII: seven-bit ASCII, a.k.a. ISO646-US, a.k.a the Basic Latin block of the Unicode
    033       * character set.
    034       */
    035      public static final Charset US_ASCII = Charset.forName("US-ASCII");
    036
    037      /**
    038       * ISO-8859-1. ISO Latin Alphabet No. 1, a.k.a. ISO-LATIN-1.
    039       */
    040      public static final Charset ISO_8859_1 = Charset.forName("ISO-8859-1");
    041
    042      /**
    043       * UTF-8: eight-bit UCS Transformation Format.
    044       */
    045      public static final Charset UTF_8 = Charset.forName("UTF-8");
    046
    047      /**
    048       * UTF-16BE: sixteen-bit UCS Transformation Format, big-endian byte order.
    049       */
    050      public static final Charset UTF_16BE = Charset.forName("UTF-16BE");
    051
    052      /**
    053       * UTF-16LE: sixteen-bit UCS Transformation Format, little-endian byte order.
    054       */
    055      public static final Charset UTF_16LE = Charset.forName("UTF-16LE");
    056
    057      /**
    058       * UTF-16: sixteen-bit UCS Transformation Format, byte order identified by an optional byte-order
    059       * mark.
    060       */
    061      public static final Charset UTF_16 = Charset.forName("UTF-16");
    062
    063      /*
    064       * Please do not add new Charset references to this class, unless those character encodings are
    065       * part of the set required to be supported by all Java platform implementations! Any Charsets
    066       * initialized here may cause unexpected delays when this class is loaded. See the Charset
    067       * Javadocs for the list of built-in character encodings.
    068       */
    069    }