Here you can find the source of normalizeWhitespace(String orig)
public static String normalizeWhitespace(String orig)
//package com.java2s; /*//from w w w. j ava2s . c o m * Copyright 2011-2016 CAST, Inc. * * This file is part of the CAST Wicket Modules: * see <http://code.google.com/p/cast-wicket-modules>. * * The CAST Wicket Modules are free software: you can redistribute and/or * modify them under the terms of the GNU Affero General Public License as * published by the Free Software Foundation, either version 3 of the * License, or (at your option) any later version. * * The CAST Wicket Modules are distributed in the hope that they will be * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * See the GNU Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this software. If not, see <http://www.gnu.org/licenses/>. */ public class Main { /** * Replace any string of whitespace characters with a single space, * and remove whitespace from the beginning and end of the string. * * @return the new string. */ public static String normalizeWhitespace(String orig) { return orig.replaceAll("\\s+", " ").trim(); } }