Here you can find the source of newArray(Object src, int len)
public static Object newArray(Object src, int len)
//package com.java2s; /**!//from w ww.j av a 2 s.c om * @author Daniel Friesen * @copyright Copyright ? 2009 Daniel Friesen * @license MIT License * * 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. */ public class Main { /** * Return a new array of the same type as the one passed */ public static Object newArray(Object src, int len) { if (src.getClass() == byte[].class) return new byte[len]; if (src.getClass() == char[].class) return new char[len]; throw illegal(); } private static IllegalArgumentException illegal() { return new IllegalArgumentException("Only char[] and byte[] arrays are handled by ArrayUtils"); } }