parsing string in java

[swapnil paranjape]

hi i am currently facing one problem

i have one string like this "23-aug-2004"

other string is like "25-aug-2005"


i need to parse these srtings and get the difference between them in no of days.

i have used parse function

DateFormat df = new SimpleDateFormat("dd-MM-yyyy");
Date d22 = df.parse(d1);
Date d23 = df.parse(d2);

but using this i can only compre strings but cant find the difference..

for this i think i need to parse it and convert into interger and then find difference..
can you pls suggest how should i do it?

[vishwanath nadimpally]

One way to do this would be to use substring() method and get the 'year', 'month' and 'day' parts of both the dates and then manually calculate the difference.

[Paul Clapham]

Continue on with

Calendar c22 = Calendar.getInstance();
c22.setTime(d22);
Calendar c23 = Calendar.getInstance();
c23.setTime(d23);
int days = 0;
while (c23.after(c22)) {
  days++;
  c22.add(Calendar.DATE, 1);
}
// Now the "days" variable has your answer.

[Jeff Albertson]

http://joda-time.sourceforge.net/

[Stefan Wagner]

 DateFormat df = new SimpleDateFormat("dd-MM-yyyy"); 

What do you think is the reason for using two Ms in the format?