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Thread: Comparing Date Strings

  1. #1
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    Default Comparing Date Strings

    EDIT: Problem solved, feel free to remove thread.

    I have a linked list of assignments, each with a due date. Im looking to iterate through this list and for each assignment due date check if the date is after the first date, therefore finding which is due first.
    Below is what i have already. Im finding the first due date and formating the string into a date i can use. Then im going through the list of assignments formatting the due date and checking if it is after the dueDate string i have.

    Im getting an error message with if(checkDate.after(dueDate)) saying checkDate is a string not a date. i have tried using the date dateCheck as well but that also doesn't work

    public void dueDate()
       {
           SimpleDateFormat ValidFormat = new SimpleDateFormat("dd/MM/yyyy");
           ListIterator<Assignment> iterator = assignmentList.listIterator(0);
     
           String dueDate = iterator.next().getDueDate();
           try
           {
               Date date = ValidFormat.parse(dueDate);
               dueDate = ValidFormat.format(date);
           }
           catch(ParseException pe)
           {
               System.out.println("ParseException" + pe);
           }
     
           while(iterator.hasNext())
           {
              String checkDate = ValidFormat.format(iterator.next().getDueDate());
              try
              {
                  Date dateCheck = ValidFormat.parse(checkDate);
                  checkDate = ValidFormat.format(dateCheck);
              }
              catch(ParseException pe)
              {
                  System.out.println("ParseException" + pe);
              }
     
              if(checkDate.after(dueDate))
                  dueDate = checkDate;
     
           }
       }
    Last edited by wdh; April 26th, 2012 at 04:52 AM.


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Comparing Date Strings

    Im getting an error message
    Please post the full text of the error message.

     String checkDate =
    This defines checkDate as a String.
    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
    Administrator copeg's Avatar
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    Default Re: Comparing Date Strings

    You have not defined what the method checkDate.after is, thus we can only guess. My guess is the method signature defines a Date as a parameter, and you are trying to pass a String

  4. #4
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    Default Re: Comparing Date Strings

    EDIT: Sorry problem fixed.
    Last edited by wdh; April 26th, 2012 at 04:51 AM.

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