public static int toDecimal(String binaryNumber) {
        int decimalNumber=0;
        int i=0;
        if (binaryNumber==null) {
            return decimalNumber;
        } else {
        while(i<binaryNumber.length()){
        decimalNumber=(int) (decimalNumber+binaryNumber.length() * Math.pow(2, i++));
        }
        return decimalNumber;
    }