DATE/TIME

[Norazanita Adnan]

hi...

need some idea or sample codes on this issue

fromActivityDate/Time : 2009-03-13 08:07:00.0
toActivityDate/Time : 2009-03-14 12:33:00.0

from this Date/Time.. how can i fine the total minute from the From and to Date/Time? at least give me the logic how it work...

i been "googeling" over the net..i cant find something similar ...

i know it sound easy but i dont have the idea how can i do..hope sumone able to help me with this

thanks in advance

[Sagar Rohankar]

My Logic:

Convert date into milliseconds
Subtract them
Convert milliseconds to minutes

[salvin francis]

There are inbuilt classes that can convert a string to a date, you have to specify the format

use this to convert both values into objects and once you have your two date objects, use Sagar Rohankar's method

[Norazanita Adnan]

is there any sample code as a guidance for me? it really help me a lot if i can have some samples codes...

[Ulf Dittmer]

There isn't much code to it if you follow the steps Sagar lists. Do you have the dates/times as Date objects or in some other formats?

Some generic date-handling code is in the http://faq.javaranch.com/java/JavaDatesFaq

[Norazanita Adnan]

          prt("USE getTime() TO RETURN MILLISECONDS");
        prt("=======================================================");
        Date startTime = new Date();
        prt("  Start Time : " + startTime);
        // ....
        // Insert ant "timed code" here...
        // ...
        System.out.print("  ");
        for (int i = 0; i < 10000000; i++) {
            if ((i % 1000000) == 0) {
                System.out.print(".");
            }
            // More "timed" code
        }
        prt();
        Date endTime = new Date();
        prt("  End Time  : " + endTime);
        long elapsed_time = endTime.getTime() - startTime.getTime();
        prt("That took " + elapsed_time + " milliseconds");
        prt();  

i have this sample..how can i set the date to what i want?
i think think code is the solution to my problem right?

[Norazanita Adnan]

this is the format

fromActivityDate/Time : 2009-03-13 08:07:00.0
toActivityDate/Time : 2009-03-14 12:33:00.0

[Norazanita Adnan]

I've solve the first part...
now just left with Convert milliseconds to minutes.. thanks so much all of you man!...
i will just Google and see how to Convert milliseconds to minutes...

thanks so much..

code ranch rock!

[Rob Spoor]

Divide by 1000 to get seconds, then by 60 to get minutes comes to mind.

Or, when using Java 6, use java.util.concurrent.TimeUnit:

TimeUnit.MILLISECONDS.toMinutes(millis);

[Norazanita Adnan]

thanks bob your solution works..but im a bit confuse and doubt where my code goes wrong.
i try your first solution

  String minutes = Integer.toString((int)((elapsed_time/60000) % 60));    

the result is 0

why is it so..but the i used

    Long secondTry = TimeUnit.MILLISECONDS.toMinutes(elapsed_time);  

it works well as it give me the value...

it just that i cast it to String as i want my return type to be Sting..or i have to ght the value first then only i can turn to String it is?

anyway..the problem solve..thanks so much...

[Rob Spoor]

What's the value of secondTry? Perhaps elapsed_time / 60000 is a multiple of 60? Because TimeUnit.MILLISECONDS.toMinutes actually just divides by 60000.

[Norazanita Adnan]

4320...it is the right output as the total days is 3days...

its ok..i just the 2nd solution that you gave..it work ..

thanks once again...

[Rob Spoor]

The first one worked as well, because 4320 % 60 == 0. I would still prefer the second solution though, since it makes it much clearer what you want to do.