java - SimpleDateFormat problems with 2 year date -

i'm trying understand 2 things:

1. why doesn't following code throw exception (since simpledateformat not lenient)
2. it doesn't throw exception, why parsing year 0013 (instead of using rules here +80:-20 years today rule)

here's code

import java.text.simpledateformat; import java.util.calendar; import java.util.date;  public class testdate {     public static void main(string[] args) throws exception {         simpledateformat format = new simpledateformat("dd/mm/yyyy");         format.setlenient(false);         date date = format.parse("01/01/13"); // since has 2 digit year, expect exception thrown          system.out.println(date); // prints sun jan 01 00:00:00 gmt 13          calendar cal = calendar.getinstance();         cal.settime(date);          system.out.println(cal.get(calendar.year)); // prints 13     } } 

if makes difference, i'm using java 1.6.0_38-b05 on ubuntu

simpledateformat api:

for parsing, if number of pattern letters more 2, year interpreted literally, regardless of number of digits. using pattern "mm/dd/yyyy", "01/11/12" parses jan 11, 12 a.d.

as lenient, when it's set false parse throws exception invalid dates, eg 01/32/12, while in lenient mode date treated 02/01/12. simpledateformat uses calendar internally, details leniency can found in calendar api.