Java Long Number Create toLong(byte[] v)

Description

to Long

License

Apache License

Declaration

public static Long toLong(byte[] v) 

Method Source Code

//package com.java2s;
/*//w w  w.j a va 2s .  c o  m
 * Copyright 2014 SunYiJun
 *
 *  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 Long toLong(byte[] v) {
        if (v == null) {
            return null;
        }
        long firstPart = (((v[0] & 0xFF) << 24) + ((v[1] & 0xFF) << 16) + ((v[2] & 0xFF) << 8) + (v[3] & 0xFF))
                * 72057594037927936l;
        int secondPart = ((v[0] & 0xFF) << 24) + ((v[1] & 0xFF) << 16) + ((v[2] & 0xFF) << 8) + (v[3] & 0xFF);
        return firstPart + secondPart;
    }
}

Related

1. toLong(byte[] n)
2. toLong(byte[] readBuffer, int o)
3. toLong(byte[] si, boolean isReverseOrder)
4. toLong(byte[] src)
5. toLong(byte[] src, int srcPos)
6. toLong(byte[] value)
7. toLong(byte[] value)
8. toLong(byte[] vint)
9. toLong(double val)