Java Long Number Create toLong(final byte[] inputBytes, int offset)

Description

Form a Long value reading 8 bytes

License

Apache License

Parameter

Parameter	Description
offset	Bytes read start position
inputBytes	Input Bytes

Return

Long representation

Declaration

public static final long toLong(final byte[] inputBytes, int offset) 

Method Source Code

//package com.java2s;
/*//w  ww  .  j  a  va2 s .  c  o m
* Copyright 2010 Bizosys Technologies Limited
*
* Licensed to the Bizosys Technologies Limited (Bizosys) under one
* or more contributor license agreements.  See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership.  The Bizosys 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.
*/

public class Main {
    /**
     * Form a Long value reading 8 bytes
     * @param offset   Bytes read start position
     * @param inputBytes   Input Bytes
     * @return   Long representation
     */
    public static final long toLong(final byte[] inputBytes, int offset) {

        if (0 == inputBytes.length)
            return 0;

        long longVal = (((long) (inputBytes[offset])) << 56) + ((inputBytes[++offset] & 0xffL) << 48)
                + ((inputBytes[++offset] & 0xffL) << 40) + ((inputBytes[++offset] & 0xffL) << 32)
                + ((inputBytes[++offset] & 0xffL) << 24) + ((inputBytes[++offset] & 0xff) << 16)
                + ((inputBytes[++offset] & 0xff) << 8) + (inputBytes[++offset] & 0xff);
        return longVal;
    }
}

Related

1. toLong(final byte[] b)
2. toLong(final byte[] b, final int offset)
3. toLong(final byte[] bytes, final int offset)
4. toLong(final byte[] data)
5. toLong(final byte[] data)
6. toLong(final Object o, final String pattern)
7. toLong(final Object obj)
8. toLong(final String bitString)
9. toLong(final String str, final long defaultValue)