IP to Decimal Notation

/**
* Title: IP To Decimal
* Author: Sher Stark
* Date: 3 September 2014
*/

package assignment1;

import java.util.Scanner;

public class Question2() {

    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);

        String ip;
        String ipArray[];
        long decimal = 0;
        int num = 0;

        do {
            System.out.print("Enter an IP address: ");
            ip = input.nextLine();

            ipArray = ip.split("\\.");
        }while(!ValidateLength(ipArray)||!ValidateRange(ipArray));

        decimal = GetDecimal(ipArray);

        PrintDecimal(decimal);
    }

    static boolean ValidateLength(String ipArray[]) {

        if(ipArray.length != 4) {
            System.out.println("Invalid IPv4 format. Please try again!");
            return false;
        }
        else
            return true;
    }

    static boolean ValidateRange(String ipArray[]) {

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

            int num = Integer.parseInt(ipArray[i]);

            if(num < 0 || num > 255) {
                System.out.println("Invalid. Please use a number between 0-255 for each component.");
                return false;
            }
        }

        return true;
    }

    static long GetDecimal(String ipArray[]) {

        long decimal = 0;

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

            int exponent = 3 - i;

            int temp = Integer.parseInt(ipArray[i]);
            decimal += temp * (Math.pow(256, exponent));
        }

        return decimal;
    }

    static void PrintDecimal(long decimal) {

        System.out.println("The decimal notation is: " + decimal);
    }