help with saving bleeding zeroes.

[SteroidalPsycho]

I have a constructor and an overridden toString() as follows:

public tlf0096Prog3a(String aString){
        //pattern and matcher to test for correct phone number format of xxx-xxx-xxxx.
        Pattern pattern = Pattern.compile("(\\d{3})-(\\d{3})-(\\d{4})");
        Matcher matcher = pattern.matcher(aString);
            try
            {   //if it doesn't match the correct format try xxx-xxxx pattern
                if(!matcher.matches()){
                    pattern = Pattern.compile("(\\d{3})-(\\d{4})");
                    matcher = pattern.matcher(aString);
                    //if still no match then throw exception
                        if (!matcher.matches())
                            throw new InvalidPhoneException();
                        /*else sets exchangeCode and number to xxx-xxxx formatted phone number
                        *using regex grouping.
                        */
                        else {
                            exchangeCode = Integer.parseInt(matcher.group(1));
                            number = Integer.parseInt(matcher.group(2));
                            }
                }
                        /* sets areaCode, exchangeCode and number to xxx-xxx-xxxx formatted
                        * phone number using regex grouping.
                        */
                        else
                        {
                            areaCode = Integer.parseInt(matcher.group(1));
                            exchangeCode = Integer.parseInt(matcher.group(2));
                            number = Integer.parseInt(matcher.group(3));
                        }
            }
            //catch InvalidPhoneException and inform user.
            catch(InvalidPhoneException e){
                System.out.println(e.getMessage());
                System.exit(0);
            }
   }//end constructor
//toString() returns a String representation of an object
    @Override
    public String toString(){
        if(areaCode!=0)
        return areaCode+"-"+exchangeCode+"-"+number;
        else
            return exchangeCode+"-"+number;
        }

If there is an areaCode, exchangeCode or number that begins with a zero, how do I replace these zeroes as they are lost when the code below is executed?

 areaCode=Integer.parseInt(matcher.group(1));
exchangeCode = Integer.parseInt(matcher.group(2));
number = Integer.parseInt(matcher.group(3));

[masijade]

Uhm, by simply saving those as Strings? They are not, really, numbers, you know? They are codes that just happen to use numbers for the symbols.

[SteroidalPsycho]

I'm in college and my professor specifically told us that we have to have the instance variables set as ints. I need a way to add zeroes to the codes that get one or more dropped because of the parsing to an int.

Thanks
tim

[JosAH]

If there is an areaCode, exchangeCode or number that begins with a zero, how do I replace these zeroes as they are lost when the code below is executed?

A phone number is not a number; numbers don't have leading zeros. Keep that phone number as a String type value.

kind regards,

Jos

[SteroidalPsycho]

I know u would never do it this way bit my professor is incompetent and I just want to please him for an a. He says there is a way to do this.

[JosAH]

I know u would never do it this way bit my professor is incompetent and I just want to please him for an a. He says there is a way to do this.

If your phone 'number' always has 10 digits conceptually you know what to do if your int implementation thereof < 10^10 (check the formatted print method(s).

kind regards,

Jos

[masijade]

As already alluded to, all you can do is "left-pad" the "number" to the designated length in toString as numbers, as already said, do not have leading zeroes. You can use the format methods of String, or even the braindead version of concatenating a String of length x 0 with your "number" and substringing the length from the right end.