Inconsistent Date Output

Question

In my textbook the following statement was made:
Quote
The compiler will interpret an incorrect date, such as March 32 as
being April 1.
Unquote
I then attempted to verify this fact.
The code I used was:
Date toDay = new Date();
ToDay.setDate(toDay.getDate()+2);
Result = Date returned was April 2
According to the book I should have seen the date of 1 April in the
output. Thinking that the problem could be related to the Date class as
during compiling I was informed by that the Date class was depreciated,
I then converted all code to use the Calendar Class, but for some
reason that I am unable to determine when I supply a valid date I get
back a wrong date, this is before any calculations are done.
Now with the Calendar class the date 31 March - Month 03 - returns the
date 1 April.
Code:
import java.util.*;
public class DatePlay
public static void main (String[] args)
Calendar test = Calendar.getInstance();
System.out.println("Before \n");
test.set (Calendar.MONTH, 03);
test.set (Calendar.DATE, 31);
System.out.println("Current Day: " + test);
System.out.println("\n");
System.out.println("Current Day: " +test.get(Calendar.DAY_OF_MONTH));
System.out.println("Current Day: " + test.get(Calendar.DATE));
System.out.println("Current Month: " +  test.get(Calendar.MONTH));
System.out.println("Current Year: " + test.get(Calendar.YEAR));
}Output:
Before
Current Day: java.util.GregorianCalendar[time=?,areFieldsSet=false,areAllFieldsSet=true,lenient=true,zone=sun.ut
il.calendar.ZoneInfo[id="Africa/Harare",offset=7200000,dstSavings=0,useDaylight=false,transi
tions=3,lastRule=null],firstDayOfWeek=1,minimalDaysInFirstWeek=1,ERA=1,Y
EAR=2003,MONTH=3,WEEK_OF_YEAR=17,WEEK_OF_MONTH=4,DAY_OF_MONTH=31,DAY_OF_
YEAR=115,DAY_OF_WEEK=6,DAY_OF_WEEK_IN_MONTH=4,AM_PM=1,HOUR=4,HOUR_OF_DAY
=16,MINUTE=46,SECOND=49,MILLISECOND=321,ZONE_OFFSET=7200000,DST_OFFSET=0
Current Day: 1
Current Day: 1
Current Month: 4
Current Year: 2003
Any assistance to resolve this situation will be greatly appreciated

Answer 1

Month numbers start at 0, not 1, so the Calendar thinks you're trying to specify the 31st of April, and is converting it to the 1st of May.
Sylvia.