How to check if the length of a number is 12 digits long?

class Fubar1

{

private static int numberOfDigits(long myNumb)

{

// the log of the number to base 10 = number of digits - 1

// so I add one to this result to get number of digits

return (int)(Math.log((double)myNumb)/Math.log(10.0)) + 1;

}

private static int numberOfDigits(String myNumb)

{

// if number is in a string representation, then the

// length is simply the length of the string

// (assuming the number isn't a float of some sort, and

// isn't a negative number. These can be checked for.

return myNumb.length();

}

public static void main(String[] args)

{

long myNumber = 123456789012;

System.out.println("using long, numberOfDigits(myNumber) = " + numberOfDigits(myNumber));

System.out.println("myNumb is 12 digits long = " + (numberOfDigits(myNumber) == 12));

System.out.println();

String myNumbStr = String.valueOf(myNumber);

System.out.println("using String, numberOfDigits(myNumStr) = " + numberOfDigits(myNumbStr));

System.out.println("myNumb is 12 digits long = " + (numberOfDigits(myNumbStr) == 12));

}

}

petes1234a at 2007-7-12 10:09:06 >