Java IP Address Get getIPV4NetwprkOrder(String theIp)

Description

turn ip in string representation to byte array in network order.

License

Apache License

Parameter

Parameter	Description
theIp	a parameter

Exception

Parameter	Description
UnknownHostException	an exception

Return

ip as byte array

Declaration

public static byte[] getIPV4NetwprkOrder(String theIp) throws UnknownHostException 

Method Source Code

//package com.java2s;
/*/*from  w w  w  . ja va  2  s  . c  o m*/
 *  Copyright 2017 AT&T
 *
 * 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.
*/

import java.net.UnknownHostException;

public class Main {
    private static final int IPV4_ADDRESS_LEN = 4;

    /**
     * turn ip in string representation to byte array in network order.
     * @param theIp
     * @return ip as byte array
     * @throws UnknownHostException
     */
    public static byte[] getIPV4NetwprkOrder(String theIp) throws UnknownHostException {
        byte[] toReturn = new byte[IPV4_ADDRESS_LEN];

        String[] fields = theIp.split("\\.");

        if (fields == null || fields.length < IPV4_ADDRESS_LEN) {
            throw new UnknownHostException();
        }
        for (int i = 0; i < fields.length; i++) {
            toReturn[i] = (byte) Integer.parseInt(fields[i]);
        }
        return toReturn;
    }
}

Related

1. getIPv4Address()
2. getIPV4Address(List addresses)
3. getIPv4Address(NetworkInterface iface)
4. getIPV4MainAddress(NetworkInterface ni)
5. getIPv4MulticastGroup(int hash)
6. getIPV6AddrArray(String s)
7. getIPV6AllAddresses(NetworkInterface ni)
8. getIpv6List()
9. getLanIPAddress()