Here you can find the source of whitespaceSplit(final String input)
public static Collection<String> whitespaceSplit(final String input)
//package com.java2s; /*//from w w w . j a v a2 s . c om * Password Management Servlets (PWM) * http://code.google.com/p/pwm/ * * Copyright (c) 2006-2009 Novell, Inc. * Copyright (c) 2009-2015 The PWM Project * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ import java.util.*; public class Main { public static Collection<String> whitespaceSplit(final String input) { if (input == null) { return Collections.emptyList(); } final String[] splitValues = input.trim().split("\\s+"); return Arrays.asList(splitValues); } }