Comparison of Dates

I have enclosed some code for you....it is Javascript and it will take the date and parse it into variables you can work with.

--

var dateStr = date.value;

var datePat = /^(\d{1,2})(\/|-)(\d{1,2})\2(\d{4})$/;

var matchArray = dateStr.match(datePat); // is the format ok?

if (matchArray == null)

{

alert("Date is not in a valid format.")

date.select();

return false;

}

// parse date into variables

day = matchArray[1];

month = matchArray[3];

year = matchArray[4];

--

If you have two dates, pass them both in and then you can compare the number of days, months or years between them.

The secod line in the code above is a regular expression string that makes sure the date conforms to:

dd/mm/yyyy

or

dd-mm-yyyy

hope it helps

wmacey at 2007-6-29 9:01:27 >

> Hi

>

> Thans for ur reply.

>

> Buit I am looking for a method using Pure Java alone,

> not using Javascript.

>

> Rajani

Hi.

Here's an example using jdk 1.3, but I think this also works pretty easy with jdk 1.2.x.

The example can only tell which date is before / after another date, but not how much is the difference, though.

Regards,

Rick

import java.util.*;

import java.text.*;

public class DateExample {

public static void main (String args[]) {

// I am not checking here the minimum number of parameters though I might

SimpleDateFormat sdf=new SimpleDateFormat("MMM'/'dd'/'yyyy");

try{

Date date0=sdf.parse(args[0]);

Date date1=sdf.parse(args[1]);

if (date0.compareTo(date1) <= 0)

System.out.println(args[0]+" before or equal "+args[1]);

else

System.out.println(args[0]+" after "+args[1]);

}

catch (ParseException pe) {

System.out.println("One of the input dates is invalid : \n"+pe);

}

}

}

amihailescu at 2007-6-29 9:01:27 >