Description
Converts a byte array of 1-8 bytes to a long.
License
Open Source License
Parameter
| Parameter | Description |
|---|
| b | the byte array to use |
Exception
| Parameter | Description |
|---|
| IllegalArgumentException | if the byte array has a length of 0 or greater than 8. |
Return
a long having the same value as the byte array. The long is left paddded with 0s.
Declaration
public static long toLong(byte[] b)
Method Source Code
//package com.java2s;
/*//from w w w.ja va 2s . c o m
* The MIT License
*
* Copyright 2013 Georgios Migdos <cyberpython@gmail.com>.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
public class Main {
/**
* Converts a byte array of 1-8 bytes to a long.
*
* @param b the byte array to use
*
* @return a long having the same value as the byte array. The long is
* left paddded with 0s.
*
* @throws IllegalArgumentException if the byte array has a length of 0 or
* greater than 8.
*/
public static long toLong(byte[] b) {
if ((b.length < 1) || (b.length > 8)) {
throw new IllegalArgumentException("Array of size " + b.length + " cannot be converted to long.");
}
long result = 0L;
for (int i = 0; i < b.length; i++) {
result = ((0xFFL & b[i]) << ((b.length - i - 1) * 8)) | result;
}
return result;
}
}
Related
- toLong(byte[] arr)
- toLong(byte[] array, int offset)
- toLong(byte[] b)
- toLong(byte[] b)
- toLong(byte[] b)
- toLong(byte[] b)
- toLong(byte[] b)
- toLong(byte[] b)
- toLong(byte[] b, int off, boolean bigEndian)