Here you can find the source of split(String s, char separator)
public static String[] split(String s, char separator)
//package com.java2s; /*//from w ww . ja va 2 s . com * Copyright (c) 2007 Yaroslav Stavnichiy, yarosla@gmail.com * * Latest version of this software can be obtained from: * http://web-tec.info/WikiParser/ * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. * * If you make use of this code, I'd appreciate hearing about it. * Comments, suggestions, and bug reports welcome: yarosla@gmail.com */ import java.util.*; public class Main { public static String[] split(String s, char separator) { // this is meant to be faster than String.split() when separator is not regexp if (s == null) return null; ArrayList<String> parts = new ArrayList<String>(); int beginIndex = 0, endIndex; while ((endIndex = s.indexOf(separator, beginIndex)) >= 0) { parts.add(s.substring(beginIndex, endIndex)); beginIndex = endIndex + 1; } parts.add(s.substring(beginIndex)); String[] a = new String[parts.size()]; return parts.toArray(a); } }