Calculate date for a week ago

Question

Part of an assignment I have is to delete logs that are a week or more older. How can I calculate the day to be 7 days ago from the current? Ive been looking at the Calendar's static properties, but I'm not if subtracting 7 from them would work.
Thanks

Answer 1

Cant say ive actually tried it while running the program, more or less been reading through the docs.
public void checkForOldLogs() {
     Calendar rightNow = Calendar.getInstance();
     int weekago = rightNow.get(Calendar.DATE - 7);
}Is what I was thinking, but im not sure if itll roll over month wise or not.
EDIT: That doesnt work, as I did a println for the weekago, get an out of bounds exception.
My log files are in the format of useridyyyymmdd.LOG
the userid is ALWAYS 8 characters long, so I could do a search for files with the userid that have an older date of that format than the current one by a week.
Code for generating the String for the filename:
public void setCurrentDate() {
     Calendar rightNow = Calendar.getInstance();
     String year = Integer.toString(rightNow.get(Calendar.YEAR));
     String month = Integer.toString(rightNow.get(Calendar.MONTH) + 1);
     String day = Integer.toString(rightNow.get(Calendar.DAY_OF_MONTH));
     if(month.length() == 1) {
          month = "0" + month;
     if(day.length() == 1) {
          day = "0" + day;
     dateString = year + month + day;
}Edited by: agm_ultimatex on Jul 1, 2009 7:09 PM