Converting IPv4 address encoded as integer to string and back, in Java.

gistfile1.java

public static String integerToStringIP(int ip) {
        return ((ip >> 24 ) & 0xFF) + "." +

               ((ip >> 16 ) & 0xFF) + "." +

               ((ip >>  8 ) & 0xFF) + "." +

               ( ip        & 0xFF);
    }

public static Long StringToIntIP(String addr) {
        String[] addrArray = addr.split("\\.");

        long num = 0;

        for (int i=0;i<addrArray.length;i++) {

            int power = 3-i;

            num += ((Integer.parseInt(addrArray[i])%256 * Math.pow(256,power)));

        }

        return num;

    }