get date 30 days ago for today

One point that wasn't mentioned--the code below *automatically* takes care of rolling over the date. You don't need to keep track of leap years, months/years changing etc (amazing what sun's libraries can do, heh. I just discovered I don't have to write my own splitstring function)

Also, you mentioned earlier that you didn't want to include any jars...I don't quite follow what you're saying. For a jsp, all you need at the top is: <%@ page import="java.util.GregorianCalendar" %>

Then just get an instance of the class & use the add method.

> Well you saw how I subtracted 30 days from the

> currect date by using the following...

> > rightNow.add(Calendar.DATE, -30);

>

>

> You can add and sutract from the month and year

> fields as well.

> > rightNow.add(Calendar.MONTH, 2); // add two months

> rightNow.add(Calendar.YEAR, -1); // subtract one

> year

>

radtad82a at 2007-7-16 23:44:16 >

The solution was given to you so I'm not sure what your problem is.

It appears to me that you have simply demonstrated what all new programmers do in this forum; you want someone to write your code for you and your too **** lazy to read the API for yourself.

http://java.sun.com/j2se/1.5.0/docs/api/index.html

The following code rolls back the date by 30 days and at the same time automatically calculates the correct year and month.

import java.util.*;

import java.text.*;

public class DateTest {

public static void main(String[] args){

DateTest d = new DateTest();

d.doWork();

}

public DateTest(){}

public void doWork(){

System.out.println("Peforming date rollback...");

// get current data & time

GregorianCalendar gcal = new GregorianCalendar();

System.out.println("Date: " + formatDate(gcal.getTime(),"MM/dd/yyyy HH:mm:ss a"));

// roll back 30 days

gcal.add(Calendar.DATE,-30);

System.out.println("Date: " + formatDate(gcal.getTime(),"MM/dd/yyyy HH:mm:ss a"));

}

// formats a date, see SimpleDateFormat class for futher information

private String formatDate(Date d, String format){

if (d != null) {

SimpleDateFormat sdf = new SimpleDateFormat(format);

FieldPosition pos = new FieldPosition(0);

StringBuffer buf = new StringBuffer();

buf = sdf.format(d,buf,pos);

return buf.toString();

}

return "";

}

}

slenzia at 2007-7-16 23:44:16 >