Java Byte Array to Long bytesToLong(final byte[] bytes)

Description

Reads a big-endian 8-byte long from an offset in the given array.

License

Open Source License

Parameter

Parameter	Description
bytes	The array to read from.

Exception

Parameter	Description
IndexOutOfBoundsException	if the byte array is too small.
NullPointerException	if the byte array is null.

Return

A long integer.

Declaration

public static long bytesToLong(final byte[] bytes) 

Method Source Code

//package com.java2s;
/**//from   www  .jav a  2  s.co  m
 * Copyright (c) 2010 Yahoo! Inc., 2016 YCSB contributors. All rights reserved.
 * <p>
 * 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
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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. See accompanying
 * LICENSE file.
 */

public class Main {
    /**
     * Reads a big-endian 8-byte long from an offset in the given array.
     * @param bytes The array to read from.
     * @return A long integer.
     * @throws IndexOutOfBoundsException if the byte array is too small.
     * @throws NullPointerException if the byte array is null.
     */
    public static long bytesToLong(final byte[] bytes) {
        return (bytes[0] & 0xFFL) << 56 | (bytes[1] & 0xFFL) << 48 | (bytes[2] & 0xFFL) << 40
                | (bytes[3] & 0xFFL) << 32 | (bytes[4] & 0xFFL) << 24 | (bytes[5] & 0xFFL) << 16
                | (bytes[6] & 0xFFL) << 8 | (bytes[7] & 0xFFL) << 0;
    }
}

Related

1. bytesToLong(byte[] inbytes, int shift)
2. bytesToLong(byte[] longBytes)
3. bytesToLong(byte[] p, int offset)
4. bytesToLong(final byte[] b)
5. bytesToLong(final byte[] bytes)
6. bytesToLong(final byte[] data, final int offset)
7. bytesToLongLE(byte[] bytes, int off)
8. byteToLong(byte[] b)
9. byteToLong(byte[] b)