IPv4 Converter Util

IPv4Converter.java

/**
 * Created with IntelliJ IDEA.
 * User: sitesh
 * Date: 7/17/13
 * Time: 9:24 PM
 * To change this template use File | Settings | File Templates.
 */
public class IPv4Converter {

    private static String longToIp(int ip) {
        int[] ipParts = new int[4];

        ipParts[0] = 0xFF & (ip >> 24);
        ipParts[1] = 0xFF & (ip >> 16);
        ipParts[2] = 0xFF & (ip >> 8);
        ipParts[3] = 0xFF & (ip >> 0);

        return ipParts[0] + "." + ipParts[1] + "." + ipParts[2] + "." + ipParts[3];
    }

    private static int ipToLong(String ipAddress) {
        String[] ipParts = ipAddress.split("\\.");

        int part0 = Integer.parseInt(ipParts[0]) << 24;
        int part1 = Integer.parseInt(ipParts[1]) << 16;
        int part2 = Integer.parseInt(ipParts[2]) << 8;
        int part3 = Integer.parseInt(ipParts[3]) << 0;

        return part0 + part1 + part2 + part3;
    }
}