compare Byte Arrays - Java File Path IO

Java examples for File Path IO:Byte Array

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Description

compare Byte Arrays

Demo Code

/**/*from   w  w  w  .  j av a 2 s . 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.java2s;

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++) {
            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 static int compareBytes(int b1, int b2) {
        int i1 = b1 & 0xFF;
        int i2 = b2 & 0xFF;
        if (i1 < i2)
            return -1;
        else if (i1 == i2)
            return 0;
        else
            return 1;
    }
}

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