Java Program to Convert Binary to Decimal

public class BinaryToDecimal {
    public static void main(String[] args) {
        long num = 110110111;
        int decimal = convertBinaryToDecimal(num);
        System.out.println(num + " in binary = " + decimal + " in decimal.");
    }

    public static int convertBinaryToDecimal(long num) {
        int decimalNumber = 0, i = 0;
        long remainder;

        while (num != 0) {
            remainder = num % 10;
            num /= 10;
            decimalNumber += remainder * Math.pow(2, i);
            ++i;
        }

        return decimalNumber;
    }
}

110110111 in binary = 439 in decimal.