String to Value and DataFormatException

[Maureen Charlton]

Hello,

I have just completed two searches in the history on StringtoValue and DataFormatException. I looked at these in the API and required more information so I went to history but unfortunately it returned no results.

Could someone suggest where to look to find out more about these?

Should I be using DataFormatException instead of the Parse Exception?

Thanking you in advance.

[Paul Speijers]

What situation will you be using the Exception for?

[marc weber]

Are you considering calling existing methods that might throw these exceptions? Or are you considering extending these exceptions in your own classes?

[Maureen Charlton]

marc and Paul,

Firstly, thank you for responding to my thread.

I have actually worked out the Exception to use so I have no problems now.

However, I would still be interest on when and what these are for?

I was originally having a date format of four digits.
The date was a String (it had to be as one came in as 0181 and zero is not seen as an integer, instead it was hex as it started with zero).

I was then using the ParseException to change the string to a date format.

My correct code in the end was as follows:

     public static void validateDate (String date) throws InvalidRecord
     {
        //Set the format for the date
        SimpleDateFormat sdf = new SimpleDateFormat ("MMyy");
        Date dateFrom = new Date ( );
        Date dateUntil = new Date ( );
        Date inputDate = new Date(  );
 
        String from = "0181";
        String until = "1220";
 
        System.out.println("\nValidating Date:  "+date);
 
        //change the String from to the SimpleDateFormat
        try  {
           dateFrom = sdf.parse(from);
        }//end try block      
        catch (ParseException e)
        {
           throw new InvalidRecord ("from date ParseException  "+dateFrom);
        }//end catch block
 
        //change the String until to the SimpleDateFormat
        try  {
           dateUntil = sdf.parse(until);
        }//end try block      
        catch (ParseException e)
        {
           throw new InvalidRecord ("Until date ParseException  "+dateUntil);
        }//end catch block
 
        //change the String date to the SimpleDateFormat
        try  {
           inputDate = sdf.parse(date);
        }//end try block      
        catch (ParseException e)
        {
           throw new InvalidRecord ("Date input by user:= "+date+"  Not valid.  \nNeeds to be four digits i.e. MMYY");
        }//end catch block
  

Again, thank you for your help!

[Paul Speijers]

I'm not sure about the DataFormatException, it's in the Zip package so I guess it has something to do with files within zipfiles having the wrong format. The ParseException however in general occurs when you try to convert a string literal to a primitive with one of the wrapper classes.