Java Hex to Long convertHexStringToLong(String hexString)

Description

convert Hex String To Long

License

Open Source License

Declaration

public static long convertHexStringToLong(String hexString) 

Method Source Code

//package com.java2s;
/************************************************************
 * Copyright (c) 2015, Lawrence Livermore National Security, LLC.
 * Produced at the Lawrence Livermore National Laboratory.
 * Written by Timothy Meier, meier3@llnl.gov, All rights reserved.
 * LLNL-CODE-673346/*from w w  w .  j  ava2 s .com*/
 *
 * This file is part of the OpenSM Monitoring Service (OMS) package.
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License (as published by
 * the Free Software Foundation) version 2.1 dated February 1999.
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * OUR NOTICE AND TERMS AND CONDITIONS OF THE GNU GENERAL PUBLIC LICENSE
 *
 * Our Preamble Notice
 *
 * A. This notice is required to be provided under our contract with the U.S.
 * Department of Energy (DOE). This work was produced at the Lawrence Livermore
 * National Laboratory under Contract No.  DE-AC52-07NA27344 with the DOE.
 *
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 *
 *        file: ParserUtils.java
 *
 *  Created on: Jun 17, 2011
 *      Author: meier3
 ********************************************************************/

public class Main {
    public static long convertHexStringToLong(String hexString) {
        // hmmm, check out Long.decode()
        // is this function necessary??
        long val = 0L;
        if ((hexString != null) && (hexString.length() > 0)) {
            // optional prefix of 0x permitted (strip off)
            //  (does not handle colons)
            String hexVal = hexString.trim();
            int ndex = 0;
            if (hexVal.startsWith("0x"))
                ndex = 2;

            hexVal = hexVal.substring(ndex);
            val = Long.parseLong(hexVal, 16);
        }
        return val;
    }
}