Java tutorial
//package com.java2s; /* * Copyright 2012 The Netty Project * * The Netty Project licenses this file to you under the Apache License, * version 2.0 (the "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations * under the License. */ import java.nio.charset.Charset; import java.nio.charset.CharsetDecoder; import java.nio.charset.CodingErrorAction; import java.util.IdentityHashMap; import java.util.Map; public class Main { private static final ThreadLocal<Map<Charset, CharsetDecoder>> decoders = new ThreadLocal<Map<Charset, CharsetDecoder>>() { @Override protected Map<Charset, CharsetDecoder> initialValue() { return new IdentityHashMap<Charset, CharsetDecoder>(); } }; /** * Returns a cached thread-local {@link CharsetDecoder} for the specified * <tt>charset</tt>. */ public static CharsetDecoder getDecoder(Charset charset) { if (charset == null) { throw new NullPointerException("charset"); } Map<Charset, CharsetDecoder> map = decoders.get(); CharsetDecoder d = map.get(charset); if (d != null) { d.reset(); d.onMalformedInput(CodingErrorAction.REPLACE); d.onUnmappableCharacter(CodingErrorAction.REPLACE); return d; } d = charset.newDecoder(); d.onMalformedInput(CodingErrorAction.REPLACE); d.onUnmappableCharacter(CodingErrorAction.REPLACE); map.put(charset, d); return d; } }