Why Java Calendar set int year int month int date not returning correct date

Question

According to doc  calendar set   is   http   docs oracle com javase 1 5 0 docs api java util Calendar html set 28int  20int  20int 29  set int year  int month  int date   Sets the values for the calendar fields YEAR  MONTH  and DAY OF MONTH    code         Calendar c1   GregorianCalendar getInstance    c1 set 2000  1  30      January 30th 2000 Date sDate   c1 getTime     System out println sDate     output   Wed Mar 01 19 32 21 JST 2000   Why it s not Jan 30

User · Answer

Selected date at the example is interesting. Example code block is:

Calendar c1 = GregorianCalendar.getInstance();
c1.set(2000, 1, 30);  //January 30th 2000
Date sDate = c1.getTime();

System.out.println(sDate);

and output Wed Mar 01 19:32:21 JST 2000.

When I first read the example i think that output is wrong but it is true:)

Calendar.Month is starting from 0 so 1 means February.
February last day is 28 so output should be 2 March.
But selected year is important, it is 2000 which means February 29 so result should be 1 March.

User · Answer

1 for month is February  The 30th of February is changed to 1st of March  You should set 0 for month  The best is to use the constant defined in Calendar   c1 set 2000  Calendar JANUARY  30

User · Answer

Months in Calendar object start from 0  0   January   Calendar JANUARY 1   february   Calendar FEBRUARY

[java] Why Java Calendar set(int year, int month, int date) not returning correct date?

Examples related to java

Examples related to calendar