Java tutorial
/* * Copyright 2016 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. */ package io.netty.handler.codec.string; import io.netty.buffer.ByteBufUtil; import io.netty.util.CharsetUtil; import io.netty.util.internal.ObjectUtil; import io.netty.util.internal.StringUtil; /** * A class to represent line separators in different environments. */ public final class LineSeparator { /** * The default line separator in the current system. */ public static final LineSeparator DEFAULT = new LineSeparator(StringUtil.NEWLINE); /** * The Unix line separator(LF) */ public static final LineSeparator UNIX = new LineSeparator("\n"); /** * The Windows line separator(CRLF) */ public static final LineSeparator WINDOWS = new LineSeparator("\r\n"); private final String value; /** * Create {@link LineSeparator} with the specified {@code lineSeparator} string. */ public LineSeparator(String lineSeparator) { this.value = ObjectUtil.checkNotNull(lineSeparator, "lineSeparator"); } /** * Return the string value of this line separator. */ public String value() { return value; } @Override public boolean equals(Object o) { if (this == o) { return true; } if (!(o instanceof LineSeparator)) { return false; } LineSeparator that = (LineSeparator) o; return value != null ? value.equals(that.value) : that.value == null; } @Override public int hashCode() { return value != null ? value.hashCode() : 0; } /** * Return a <a href="http://en.wikipedia.org/wiki/Hex_dump">hex dump</a> of the line separator in UTF-8 encoding. */ @Override public String toString() { return ByteBufUtil.hexDump(value.getBytes(CharsetUtil.UTF_8)); } }