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?

Answer 1

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.

Answer 2

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

Answer 3

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();

Answer 4

Use this ...

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

Answer 5

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The other Answers are outdated as of Java 8.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.

TheInstant 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 .

Answer 6

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);

Answer 7

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.

Answer 8

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());