Here you can find the source of split(String str, char separator)
public static String[] split(String str, char separator)
//package com.java2s; /**//from ww w .j a v a 2 s . c om * Copyright 2013 ?????? * * Licensed 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. */ import java.util.StringTokenizer; public class Main { public static String[] split(String str, char separator) { return split(str, new String(new char[] { separator })); } public static String[] split(String str, String separator) { if (str == null) { return null; } String[] result; int i = 0; // index into the next empty array element // --- Declare and create a StringTokenizer StringTokenizer st = new StringTokenizer(str, separator); // --- Create an array which will hold all the tokens. result = new String[st.countTokens()]; // --- Loop, getting each of the tokens while (st.hasMoreTokens()) { result[i++] = st.nextToken(); } return result; } }