Here you can find the source of split(final String s)
public static Iterable<String> split(final String s)
//package com.java2s; /*//from ww w . j av a2 s . c o m * Copyright (C) 2010 eXo Platform SAS. * * This is free software; you can redistribute it and/or modify it * under the terms of the GNU Lesser General Public License as * published by the Free Software Foundation; either version 2.1 of * the License, or (at your option) any later version. * * This software 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this software; if not, write to the Free * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA, or see the FSF site: http://www.fsf.org. */ import java.util.Iterator; import java.util.NoSuchElementException; public class Main { public static Iterable<String> split(final String s) { return new Iterable<String>() { public Iterator<String> iterator() { return new Iterator<String>() { /** The index of previous. */ private int from = 0; public boolean hasNext() { return from <= s.length(); } public String next() { if (from > s.length()) { throw new NoSuchElementException(); } int to = s.indexOf('\n', from); if (to == -1) { to = s.length(); } String next = s.substring(from, to); from = to + 1; return next; } public void remove() { throw new UnsupportedOperationException(); } }; } }; } }