返回给定长度的给定数组的副本。

/*

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

 *//**来 自 N o w J a v a . c o m - 时代Java**/

//package com.nowjava;


public class Main {

    public static void main(String[] argv) throws Exception {

        byte[] arr = new byte[] { 34, 35, 36, 37, 37, 37, 67, 68, 69 };

        int newLength = 2;

        System.out.println(java.util.Arrays

                .toString(copyOf(arr, newLength)));

    }


    /**

     * Returns a copy of the given array of the given length.

     */

    public static byte[] copyOf(byte[] arr, int newLength) {

        return copyOf(arr, 0, newLength);/*from n o w j a   v  a . c o m - 时  代  Java*/

    }


    /**

     * Returns a copy of the given array of the given length starting at the

     * given position.

     */

    public static byte[] copyOf(byte[] arr,