Some quick assistance please...

Question

import java.util.Calendar;
import java.util.GregorianCalendar;
public class DateProject
     public static void main(String[] args)
          GregorianCalendar cal = new GregorianCalendar();
          GregorianCalendar eckertsBirthday = new GregorianCalendar(1919, Calendar.APRIL, 9);
          int dayOfMonth = cal.get(Calendar.DAY_OF_MONTH);
          int month = cal.get(Calendar.MONTH);
          int year = cal.get(Calendar.YEAR);
          int weekDay = cal.get(Calendar.DAY_OF_WEEK);
          System.out.print("Current date: ");
          System.out.print(weekDay);
          System.out.print(" ");
          System.out.print(month);
          System.out.print("-");
          System.out.print(dayOfMonth);
          System.out.print("-");
          System.out.println(year);
          System.out.print("1 day later: ");
          System.out.print(weekDay);
          System.out.print(" ");
          System.out.print(month);
          System.out.print("-");
          cal.add(Calendar.DAY_OF_MONTH, 1);
          System.out.print(dayOfMonth);
          System.out.print("-");
          System.out.println(year);
}Output:
Current date: 2 1-18-2008
1 day later: 2 1-18-2008
Process completed.
Okay, for some reason, the date was not incremented by one day and I'm unsure why. I know the .add method is a mutator so I would think it would mutate the cal reference object but it obviously didn't work... What am I doing wrong? Thanks in advance! :)

Answer 1

Try
int dayOfMonth = cal.get(Calendar.DAY_OF_MONTH);
          int month = cal.get(Calendar.MONTH);
          int year = cal.get(Calendar.YEAR);
          int weekDay = cal.get(Calendar.DAY_OF_WEEK);
          System.out.print("Current date: ");
          System.out.print(weekDay);
          System.out.print(" ");
          System.out.print(month);
          System.out.print("-");
          System.out.print(dayOfMonth);
          System.out.print("-");
          System.out.println(year);
          cal.add(Calendar.DAY_OF_MONTH, 1);
          System.out.print("1 day later: ");
          System.out.print(cal.get(Calendar.DAY_OF_WEEK));
          System.out.print(" ");
          System.out.print(cal.get(Calendar.MONTH));
          System.out.print("-");
          System.out.print(cal.get(Calendar.DAY_OF_MONTH));
          System.out.print("-");
          System.out.println(cal.get(Calendar.YEAR));