Java tutorial
//package com.java2s; /* Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF 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.io.ByteArrayInputStream; import java.io.IOException; import java.io.InputStreamReader; import java.io.PushbackInputStream; import java.io.Reader; public class Main { /** * Creates a reader from the given input stream and encoding. * This method assumes the input stream working buffer is at least * 128 byte long. The input stream is restored before this method * returns. The 4 first bytes are skipped before creating the reader. */ protected static Reader createXMLDeclarationReader(PushbackInputStream pbis, String enc) throws IOException { byte[] buf = new byte[128]; int len = pbis.read(buf); if (len > 0) { pbis.unread(buf, 0, len); } return new InputStreamReader(new ByteArrayInputStream(buf, 4, len), enc); } }