比较字节数组

//from n o w j a v a . c o m

/**

 * Licensed to the Apache Software Foundation (ASF) under one

 * or more contributor license agreements.  See the NOTICE file

 * distributed with this work for additional information

 * regarding copyright ownership.  The ASF licenses this file

 * to you 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.

 */

//package com.nowjava;


public class Main {

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

        byte[] bytes1 = new byte[] { 34, 35, 36, 37, 37, 37, 67, 68, 69 };

        byte[] bytes2 = new byte[] { 34, 35, 36, 37, 37, 37, 67, 68, 69 };

        System.out.println(compareByteArrays(bytes1, bytes2));

    }


    public static int compareByteArrays(byte[] bytes1, byte[] bytes2) {

        if (null == bytes1) {

            if (null == bytes2)

                return 0;

            else

                return -1;

        }

        if (null == bytes2)

            return 1;


        for (int i = 0; i < bytes1.length && i < bytes2.length; i++) {/* 来自 时代Java公众号 - nowjava.com*/

            int cmp = compareBytes(bytes1[i], bytes2[i]);

            if (0 != cmp)

                return cmp;

        }

        if (bytes1.length == bytes2.length)

            return 0;

        else

            return (bytes1.length < bytes2.length) ? -1 : 1;

    }


    public static int compareBytes(byte b1, byte b2) {

        return compareBytes((int) b1, (int) b2);

    }


    public