Here you can find the source of indent(final String s)
public static String indent(final String s)
//package com.java2s; /*//from www .ja v a 2 s. c o m * 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. */ public class Main { private static final String TAB = " "; public static String indent(final String s) { if (s.isEmpty()) { return s; } return TAB + s.replaceAll("(\\r\\n|\\r|\\n)(.+)", "$1" + TAB + "$2"); } }