Java IP Address to Int ipToInt(final String addr)

Description

Converts the text form of an IP address to an integer.

License

Open Source License

Parameter

Parameter	Description
addr	a parameter

Declaration

public static int ipToInt(final String addr) 

Method Source Code

//package com.java2s;
/**/*from   w  ww  .  ja  v  a  2 s  .  co m*/
 * Copyright (C) 2011 Rafael Bedia
 *
 * 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.
 * http://www.gnu.org/copyleft/gpl.html
 */

public class Main {
    /**
     * Converts the text form of an IP address to an integer.
     * 
     * @param addr
     * @return
     */
    public static int ipToInt(final String addr) {
        final String[] addressBytes = addr.split("\\.");

        if (addressBytes.length != 4) {
            throw new IllegalArgumentException("IPs have the format x.x.x.x");
        }

        int ip = 0;
        for (int i = 0; i < 4; i++) {
            ip <<= 8;
            ip |= Integer.parseInt(addressBytes[i]);
        }
        return ip;
    }
}

Related

1. ip2Int(String addr)
2. ip2Int(String ip)
3. ip2int(String ip)
4. IP2Int(String ip)
5. ip2int(String ipAddr)
6. ipToInt(String addr)
7. ipToInt(String address)
8. ipToInt(String ip)
9. ipToInt(String ipAddr)