Here you can find the source of copyOf(byte[] arr, int newLength)
public static byte[] copyOf(byte[] arr, int newLength)
//package com.java2s; /*// ww w .j a v a 2s .co m Copyright (c) 2005 Health Market Science, Inc. This library 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 library 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 library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA You can contact Health Market Science at info@healthmarketscience.com or at the following address: Health Market Science 2700 Horizon Drive Suite 200 King of Prussia, PA 19406 */ public class Main { /** * Returns a copy of the given array of the given length. */ public static byte[] copyOf(byte[] arr, int newLength) { return copyOf(arr, 0, newLength, 0); } /** * Returns a copy of the given array of the given length starting at the * given position. */ public static byte[] copyOf(byte[] arr, int offset, int newLength) { return copyOf(arr, offset, newLength, 0); } /** * Returns a copy of the given array of the given length starting at the * given position. */ public static byte[] copyOf(byte[] arr, int offset, int newLength, int dstOffset) { byte[] newArr = new byte[newLength]; int srcLen = arr.length - offset; int dstLen = newLength - dstOffset; System.arraycopy(arr, offset, newArr, dstOffset, Math.min(srcLen, dstLen)); return newArr; } }