Java Snippet regarding date

Hi everyone!

I wrote a Java Snippet, that should test if deliverydatereal is equal to 0002-11-30. If that´s the case then it should be changed to deliverydatepromised - 1 

If not then the real date should be returned.

I wrote the following code (I changed the code of IRIS from this forum a bit):

DateFormat format = new SimpleDateFormat("yyyy-MM-dd");
Date real = new Date();
Date prom = new Date();
 try{
        real = format.parse($deliverydatereal$);
        prom = format.parse($deliverydatepromised$);
          if (real.equals("0002-11-30")) {
          //subtract 1 day
          prom.setTime(prom.getTime()-1 * 24  * 60 * 60 * 1000); }
          else { prom = real; }
        }
catch(Exception e){}
return format.format(prom);

The problem is that only the old real dates are returned for all rows. There has to be something wrong with the if statement, but I can´t figure it out.

Thank you in advance
Best regards