Java Timestamp - Adding five minutes

Question

looking for some help with a bit of Java code i'm working on, i have the following code which prints out the date and time:

  Date dNow = new Date( ); // Instantiate a Date object
  SimpleDateFormat ft = new SimpleDateFormat ("MMM d, yyyy k:mm:ss");  // Time at server

Result: Mar 15, 2013 10:19:48

I'm creating a javascript counter to work from this number and countdown from 5 minutes. So i need to add 5 minues to the current date time in Java.

So, if the current date time is: Mar 15, 2013 10:19:48

I need to add 5 minutes to Java so that it prints out: Mar 15, 2013 10:24:48

Any ideas?

Marko Topolnik · Accepted Answer · 2020-05-27T13:13:53.430

65

Instead of starting with

new Date()

start with

new Date(System.currentTimeMillis() + TimeUnit.MINUTES.toMillis(5))

This will give you a Date instance that represents your required point in time. You don't need to change any other part of your code.

edited May 27 '20 at 13:13

answered Mar 15 '13 at 10:30

Marko Topolnik

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score 21 · Answer 2 · answered Jan 30 '15 at 20:42

Ignoring Dates and focusing on the question.

My preference is to use java.util.concurrent.TimeUnit since it adds clarity to my code.

In Java,

long now = System.currentTimeMillis();

5 minutes from now using TimeUtil is:

long nowPlus5Minutes = now + TimeUnit.MINUTES.toMillis(5);

Reference: http://docs.oracle.com/javase/7/docs/api/java/util/concurrent/TimeUnit.html

PermGenError · Answer 3 · 2013-03-15T10:36:37.567

16

You should use Calendar class to manipulate Date and time:

The Calendar class is an abstract class that provides methods for converting between a specific instant in time and a set of calendar fields such as YEAR, MONTH, DAY_OF_MONTH, HOUR, and so on, and for manipulating the calendar fields, such as getting the date of the next week

  Date dNow = new Date( ); // Instantiate a Date object
  Calendar cal = Calendar.getInstance();
  cal.setTime(dNow);
  cal.add(Calendar.MINUTE, 5);
  dNow = cal.getTime();

edited Mar 15 '13 at 10:36

answered Mar 15 '13 at 10:30

PermGenError

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You should never use the Calendar class for anything. Use Joda time for these manipulations. – Thorbjørn Ravn Andersen Mar 15 '13 at 10:39
@ThorbjørnRavnAndersen well, i hear ppl saying this all the time. I have personally never use Joda time.I have heard it makes date manipulating pretty simple. but if you wanna manipulate dates using standard API then calendar is the way to go. However, i have read somewhere that Joda time would be part of standard java API from java 8. :) – PermGenError Mar 15 '13 at 10:41
4

It is the [JSR 310](http://jcp.org/en/jsr/detail?id=310) and it will not be a completely new API, only heavily influenced by JodaTime. – Marko Topolnik Mar 15 '13 at 10:51
@PermGenError You should listen to what all these people say all the time and try using it and then consider how the better design of the API makes it easier to do what you actually want (and do it correct) – Thorbjørn Ravn Andersen Mar 15 '13 at 11:32
@ThorbjørnRavnAndersen hehe, i never really had a requirement to do complex date/time manipulating stuff. as i said for simple date/time manipulation as such external API is not required, infact for problem as simple as this it has to be handled as show in mark's answer.:), thanks though, i will look into joda time .. :) – PermGenError Mar 15 '13 at 11:35

score 7 · Answer 4 · edited May 23 '17 at 12:18

tl;dr

Instant.now()
       .plusSeconds( TimeUnit.MINUTES.toSeconds( 5 ) )
       .toString()

2017-01-23T03:11:53.763Z

Details

The other Answers are outdated as of Java 8. The troublesome old date-time classes are now legacy, supplanted by the java.time classes.

The Instant class represents a moment on the timeline in UTC with a resolution of nanoseconds (up to nine (9) digits of a decimal fraction).

Instant instant = Instant.now();

This class can do math such as adding a number of seconds. We can use the TimeUnit enum to covert our desired five minutes into a number of seconds.

long seconds = TimeUnit.MINUTES.toSeconds( 5 );
Instant fiveMinutesLater = instant.plusSeconds( seconds );

To generate a string in standard ISO 8601 format, call toString.

String output = fiveMinutesLater.toString();

To generate strings in other formats, use the ZonedDateTime class and DateTimeFormatter class. Search Stack Overflow for many examples and discussions of those classes.

About java.time

The java.time framework is built into Java 8 and later. These classes supplant the troublesome old legacy date-time classes such as java.util.Date, Calendar, & SimpleDateFormat.

The Joda-Time project, now in maintenance mode, advises migration to the java.time classes.

To learn more, see the Oracle Tutorial. And search Stack Overflow for many examples and explanations. Specification is JSR 310.

Where to obtain the java.time classes?

Java SE 8 and SE 9 and later
- Built-in.
- Part of the standard Java API with a bundled implementation.
- Java 9 adds some minor features and fixes.
Java SE 6 and SE 7
- Much of the java.time functionality is back-ported to Java 6 & 7 in ThreeTen-Backport.
Android
- The ThreeTenABP project adapts ThreeTen-Backport (mentioned above) for Android specifically.
- See How to use ThreeTenABP….

The ThreeTen-Extra project extends java.time with additional classes. This project is a proving ground for possible future additions to java.time. You may find some useful classes here such as Interval, YearWeek, YearQuarter, and more.

score 5 · Answer 5 · answered Mar 15 '13 at 10:28

5

Use this ...

    Calendar calendar = Calendar.getInstance();
    System.out.println(calendar.getTime());
    calendar.add(Calendar.MINUTE, 5);
    System.out.println(calendar.getTime());

answered Mar 15 '13 at 10:28

Sudhanshu Umalkar

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score 2 · Answer 6 · edited May 21 '14 at 16:33

2

Date dNow = new Date(System.currentTimeMillis()+5*60*1000)
SimpleDateFormat ft = new SimpleDateFormat ("MMM d, yyyy k:mm:ss");
System.out.println(ft.format(dNow));

with the help of deprecated method getMinutes(),setMinutes(int)

 Date dNow = new Date( ); // Instantiate a Date object
 int mm = dNow.getMinutes();
 dNow.setMinutes(mm+5);

edited May 21 '14 at 16:33

BenMorel

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answered Mar 15 '13 at 10:38

subodh

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score 0 · Answer 7 · answered Mar 15 '13 at 10:30

0

Java dates use Unix time in milliseconds. So you either calculate how much 5 minutes are in milliseconds and add them to your date or use the Calendar class which does it for you.

answered Mar 15 '13 at 10:30

Christophe Roussy

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score 0 · Answer 8 · answered Mar 02 '18 at 05:35

You can try this one best performance



    GregorianCalendar gc = new GregorianCalendar();
            gc.setTimeInMillis(System.currentTimeMillis());
            gc.add(Calendar.MINUTE, -5);
            System.out.println(new java.util.Date().getTime());
            System.out.println(new java.util.Date(gc.getTime().getTime()).getTime());

Java Timestamp - Adding five minutes

8 Answers8

tl;dr

Details

About java.time