How to compare 2 Dates..?

I am retrieving a date from a text file, and I'd like to create a Date object with it, to compare it with the current date, and get the difference in days between them...
I've tried during a long time to succeed, but the Date class is quite weird and I couldn't figure it out...
Thanks

Well, I got to that point now..
I am able to retrieve the current date and have it under the format I wish, and I am able to create another custom date with the format I wish with the following code:
          SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd");
          String customDate = new String("2002/03/01");
          Calendar cal = Calendar.getInstance();
          String currentDate = new String(cal.get(Calendar.YEAR)+"/"+cal.get(Calendar.MONTH)+"/"+cal.get(Calendar.DATE));
          Date today = new Date();
          Date custom = new Date();
          try
               today = sdf.parse(currentDate);
               custom = sdf.parse(customDate);
          catch(ParseException e)
          System.out.println(sdf.format(custom));
          System.out.println(sdf.format(today));

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