Here you can find the source of toCharArray(String map)
public static char[] toCharArray(String map)
//package com.java2s; /**/*from w w w . jav a2s . c om*/ * Copyright 2010 Molindo GmbH * * 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. */ public class Main { public static char[] toCharArray(String map) { int[] values = toIntArray(map); if (values == null) { return null; } char[] chars = new char[values.length]; for (int i = 0; i < values.length; i++) { chars[i] = (char) values[i]; } return chars; } public static int[] toIntArray(String map) { if (map == null) { return null; } String[] str = map.split("\\s+"); final int[] values = new int[str.length]; for (int i = 0; i < values.length; i++) { values[i] = Integer.parseInt(str[i], 16); } return values; } }