Converts a binary number to a decimal

[cachi]

I need to write a method that converts a binary number to a decimal. Here is what i have so far any suggestions on how i can get this to work right now it returns 147.0 when you enter the binary number 11 which should have the decimal equivalent of 3.

Does anyone know where i messed up? I've been working on just this method for probably 8 hours including yesterday and today and i don't think I'm even close.

static double toDecimal (String s)
  {
    int l = s.length();
    double result = 0;

    for (int i = 0; i < l; i++)
    { 
      result = result + s.charAt(i) * Math.pow(2, (s.length() - i - 1));
    }
    return result;
  }

Thanks.

[hardwired]

We only want to add the values of the bits that are turned on
and to ignore the zero/off bits.

private static double toDecimal(String s) {
    int l = s.length();
    double result = 0;

    for (int i = 0; i < l; i++) {
        if(s.charAt(i) == '1')
            result = result + Math.pow(2, (s.length() - i - 1));
    }
    return result;
}