?
Solved

Problem with leap years using SimpleDateFormat

Posted on 2000-03-04
5
Medium Priority
?
1,228 Views
Last Modified: 2012-06-27
Why does my code doesn't work for 'leap' years? Could anyone suggest a work around? Please post sample code. Thanks.

-Murali


                                import java.text.*;
                                 
                                public class date
                                {
                                        static SimpleDateFormat format = new SimpleDateFormat("MM/dd/yyyy");
                                 
                                        public static boolean isValidDate(String date)
                                        {
                                                format.setLenient(false);
                                                return format.parse(date,new ParsePosition(0)) == null ? false : true;
                                        }
                                 
                                        public static void main(String[] args)
                                        {
                                                String day1 = "02/29/1996";
                                                System.out.println(day1 + " is valid: " + isValidDate(day1));
                                        }
                                }
0
Comment
Question by:mk1234
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
5 Comments
 

Expert Comment

by:kletkeman
ID: 2584063
I ran your code under Visual J++ 6.0 and it worked fine for me. The answer was "TRUE". OS is Windows 2000.
0
 
LVL 7

Expert Comment

by:Ravindra76
ID: 2584607


WHat is Ur problem mk1234??
0
 

Author Comment

by:mk1234
ID: 2587717
ravindra

Read my code. It seems to think a leap year date such as 02/29/96 is not a valid date
0
 

Expert Comment

by:kletkeman
ID: 2589566
Since I've already posted that your code works fine under Windows 2000 with Visual J++, it would be very helpful if you would follow up with your particular configuration and toolset, as you apparently are not getting the correct result. That way, someone who uses the same setup could try to answer the question.
0
 
LVL 1

Accepted Solution

by:
jadrek85 earned 300 total points
ID: 2590426
Hi Murali,

Here is the code, which validates the date for leap year. enter different year, month and day to check for leap year.

//Start code
import java.text.*;
import java.util.*;


public class LeapYear{
  public static boolean isValidDate(String date){
    Date dt=new Date(date);
    if(dt.getMonth()+1==parseMonth(date)){
      return true;
    }else
      return false;
  }

  public static void main(String[] args){
    String day1 = "02/29/1996";  // change the date here
    System.out.println(day1 + " is valid: " + isValidDate(day1.trim()));
    for(;;);  // this is to hold the window
    }
  public static int parseMonth(String dt){
    return Integer.parseInt(dt.substring(0,dt.indexOf("/",0)));
  }
}
// End code

Good Luck,

Jadhav
0

Featured Post

Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Go is an acronym of golang, is a programming language developed Google in 2007. Go is a new language that is mostly in the C family, with significant input from Pascal/Modula/Oberon family. Hence Go arisen as low-level language with fast compilation…
Introduction This article is the second of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article covers the basic installation and configuration of the test automation tools used by…
Viewers will learn one way to get user input in Java. Introduce the Scanner object: Declare the variable that stores the user input: An example prompting the user for input: Methods you need to invoke in order to properly get  user input:
This tutorial will introduce the viewer to VisualVM for the Java platform application. This video explains an example program and covers the Overview, Monitor, and Heap Dump tabs.
Suggested Courses
Course of the Month13 days, 8 hours left to enroll

801 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question