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
017package com.google.common.base;
018
019import 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
027 */
028public 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}