A way to increment java.util.Date

Question

hi folks,
does anyone know of a clean way to increase java.uil.Date object by one day? I can use setTime(getTime()+1_day_time_in_millsecons); but it seems unnatural...
thanks

Answer 1

Like below
cal.add(cal.DATE,num); /* Date Offset */
/* DateOffset.java
2003/01/15 eric.leung
Compile
=======
javac DateOffset.java
Application
===========
java DateOffset -d off_set
Return
======
yyyy/mm/dd
import java.util.*;
import java.text.*;
public final class DateOffset { 
public static void main(String[] args)
throws Exception{   
int num = 0;
int i = 0;
for (int j=0;j< args.length;j++) {
if (args[j].trim().equals("-d")) {
if ( j + 1 < args.length ) {
try {
num = Integer.parseInt(args[j+1]);
} catch (NumberFormatException e) {
num = 0;
TimeZone zone = new SimpleTimeZone(8*60*60*1000,"GMT+0800");
Calendar cal = Calendar.getInstance(zone);// this seems to be a point
cal.set(Calendar.YEAR, 1970); // example
DateFormat formatter = new SimpleDateFormat();
formatter.setCalendar(cal); //this is necessary
Date date = new Date();
formatter.format(date);
cal.add(cal.DATE,num); /* Date Offset */
System.out.print(cal.get(cal.YEAR) +"/");
i = cal.get(cal.MONTH) + 1;
if (cal.get(cal.MONTH) < 10 )
System.out.print("0" + i + "/");
else
System.out.print(i + "/");
if (cal.get(cal.DATE) < 10 )
System.out.println("0" + cal.get(cal.DATE));
else
System.out.println(cal.get(cal.DATE));
}