Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/**
 * Copyright (c) 2016 Couchbase, Inc. All rights reserved.
 *
 * Licensed 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.
 */

public class Main {
    public static byte[] concat(byte[] arr1, byte[] arr2) {
        return concat(arr1, 0, (arr1 != null) ? arr1.length : 0, arr2, 0, (arr2 != null) ? arr2.length : 0);
    }

    public static byte[] concat(byte[] arr1, int offset1, int len1, byte[] arr2, int offset2, int len2) {
        if (len1 == 0) {
            return subarray(arr2, offset2, len2);
        } else if (len2 == 0) {
            return subarray(arr1, offset1, len1);
        } else {
            byte[] result = new byte[len1 + len2];
            System.arraycopy(arr1, offset1, result, 0, len1);
            System.arraycopy(arr2, offset2, result, len1, len2);
            return result;
        }
    }

    public static byte[] subarray(byte[] arr, int offset, int len) {
        if (len == 0) {
            return new byte[0];
        }
        if ((offset == 0) && (len == arr.length)) {
            return arr;
        }
        byte[] result = new byte[len];
        System.arraycopy(arr, offset, result, 0, len);
        return result;
    }
}