Time format with java

Question

Possible Duplicate:
How to transform currentTimeMillis to a readable date format?

This is my code:

long currentTime = System.currentTimeMillis();
final String appTime1 = Long.toString(currentTime);

it display the time as 1353929203337

Please i ask how can change the first format of time to this format 10:25:24 ?

Thank you.

score 4 · Accepted Answer · answered Nov 26 '12 at 12:04

4

Date date = new Date(currentTime); // if U really have long
Strint result = new SimpleDateFormat("HH:mm:ss").format(date.getTime());

answered Nov 26 '12 at 12:04

Romczyk

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3
12

Sure, but user1735757 have started with long, I wasn't sure what exactly he needs. My approach just converts to String whaat he had as incoming parameter. – Romczyk Nov 26 '12 at 12:14
2

@GanGnaMStYleOverFlowErroR The `Date` constructor that takes a `long` is not deprecated; see the API documentation. – Jesper Nov 26 '12 at 12:19
@Jesper oops, my bad. +1, guess i was just confused :P – PermGenError Nov 26 '12 at 12:21
@Romczyk: please i ask if its possible to have also millisecondes and nanosecondes here new SimpleDateFormat("HH:mm:ss") ? Thank you for answer – user1735757 Nov 28 '12 at 13:34
Milliseconds yes: ("HH:mm:ss:SSS") http://docs.oracle.com/javase/1.4.2/docs/api/java/text/SimpleDateFormat.html But I am not sure, how it's best can be done to get nanoseconds printed: you can try ("HH:mm:ss:SSSSSS") out – Romczyk Nov 28 '12 at 15:28
And yes, as other users have stated, using Calendar would be a better approach – Romczyk Nov 28 '12 at 15:35

score 0 · Answer 2 · edited Jan 29 '20 at 09:02

That's right, it's showing the time in milliseconds dating back from 1st January 1970. Use SimpleDateFormat to format the date.

Try this code:

public class DateChk {


    public static void main(String[] args){

        DateChk chk = new DateChk();
        String s = chk.getCaptureDate();

        System.out.println(s);

    }

    public String getCaptureDate() {


        SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");
        String dateTime = sdf.format(System.currentTimeMillis()); // Your Answer
        return dateTime;
    }

}

score 0 · Answer 3 · answered Nov 26 '12 at 12:20

0

It depends for what you need it for:
For simple debugging output the simplest is:

 final String appTime1 = new Date(currentTime).toString();

For more serius time calculations you better use Calendar.

answered Nov 26 '12 at 12:20

AlexWien

28,470
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pengibot · Answer 4 · 2012-11-26T14:48:11.733

-1

System.currentTimeMillis()

will get you the number of milliseconds since some date in the 70's.

If you want the current time you need to use a Calendar class and retrieve the time out of there using SimpleDateFormat.

Calendar cal = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");
System.out.println( sdf.format(cal.getTime()) );

edited Nov 26 '12 at 14:48

answered Nov 26 '12 at 12:03

pengibot

1,492
3
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Time format with java

4 Answers4