Converting Milliseconds to Minutes and Seconds?

Question

I would suggest using TimeUnit. You can use it like this:

long minutes = TimeUnit.MILLISECONDS.toMinutes(millis);
long seconds = TimeUnit.MILLISECONDS.toSeconds(millis);

After converting millis to seconds (by dividing by 1000), you can use / 60 to get the minutes value, and % 60 (remainder) to get the "seconds in minute" value.

long millis = .....;  // obtained from StopWatch
long minutes = (millis / 1000)  / 60;
int seconds = (int)((millis / 1000) % 60);

tl;dr

Duration d = Duration.ofMillis( … ) ;
int minutes = d.toMinutesPart() ;
int seconds = d.toSecondsPart() ;

Java 9 and later

In Java 9 and later, create a Duration and call the to…Part methods. In this case: toMinutesPart and toSecondsPart.

Capture the start & stop of your stopwatch.

Instant start = Instant.now(); 
…
Instant stop = Instant.now();

Represent elapsed time in a Duration object.

Duration d = Duration.between( start , stop );

Interrogate for each part, the minutes and the seconds.

int minutes = d.toMinutesPart();
int seconds = d.toSecondsPart();

You might also want to see if your stopwatch ran expectedly long.

Boolean ranTooLong = ( d.toDaysPart() > 0 ) || ( d.toHoursPart() > 0 ) ;

Java 8

In Java 8, the Duration class lacks to…Part methods. You will need to do math as shown in the other Answers.

long entireDurationAsSeconds = d.getSeconds();

Or let Duration do the math.

long minutesPart = d.toMinutes(); 
long secondsPart = d.minusMinutes( minutesPart ).getSeconds() ;

See live code in IdeOne.com.

Interval: 2016-12-18T08:39:34.099Z/2016-12-18T08:41:49.099Z

d.toString(): PT2M15S

d.getSeconds(): 135

Elapsed: 2M 15S

Resolution

FYI, the resolution of now methods changed between Java 8 and Java 9. See this Question.

• Java 9 captures the moment with a resolution as fine as nanoseconds. Resolution depends on capability of your computer’s hardware. I see microseconds (six digits of decimal fraction) on MacBook Pro Retina with macOS Sierra.
• Java 8 captures the moment only up to milliseconds. The implementation of Clock is limited to a resolution of milliseconds. So you can store values in nanoseconds but only capture them in milliseconds.

---

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.

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

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

You may exchange java.time objects directly with your database. Use a JDBC driver compliant with JDBC 4.2 or later. No need for strings, no need for java.sql.* classes.

Where to obtain the java.time classes?

• Java SE 8, Java SE 9, Java SE 10, Java SE 11, and later - Part of the standard Java API with a bundled implementation.
  • Java 9 adds some minor features and fixes.
• Java SE 6 and Java SE 7
  • Most of the java.time functionality is back-ported to Java 6 & 7 in ThreeTen-Backport.
• Android
  • Later versions of Android bundle implementations of the java.time classes.
  • For earlier Android (<26), the ThreeTenABP project adapts ThreeTen-Backport (mentioned above). See How to use ThreeTenABP….

I was creating a mp3 player app for android, so I did it like this to get current time and duration

 private String millisecondsToTime(long milliseconds) {
    long minutes = (milliseconds / 1000) / 60;
    long seconds = (milliseconds / 1000) % 60;
    String secondsStr = Long.toString(seconds);
    String secs;
    if (secondsStr.length() >= 2) {
        secs = secondsStr.substring(0, 2);
    } else {
        secs = "0" + secondsStr;
    }

    return minutes + ":" + secs;
}

This is just basic math. 1000 milliseconds=1 second and 60000 milliseconds = 1 minute; So just do,

int seconds=(millis/1000)%60;

long minutes=((millis-seconds)/1000)/60;

To convert time in millis directly to minutes: second format you can use this

String durationText = DateUtils.formatElapsedTime(timeInMillis / 1000));

This will return a string with time in proper formatting. It worked for me.

  public static String getIntervalTime(long longInterval) {
    
    long intMillis = longInterval;
    long dd = TimeUnit.MILLISECONDS.toDays(intMillis);
    long daysMillis = TimeUnit.DAYS.toMillis(dd);
    intMillis -= daysMillis;
    long hh = TimeUnit.MILLISECONDS.toHours(intMillis);
    long hoursMillis = TimeUnit.HOURS.toMillis(hh);
    intMillis -= hoursMillis;
    long mm = TimeUnit.MILLISECONDS.toMinutes(intMillis);
    long minutesMillis = TimeUnit.MINUTES.toMillis(mm);
    intMillis -= minutesMillis;
    long ss = TimeUnit.MILLISECONDS.toSeconds(intMillis);
    long secondsMillis = TimeUnit.SECONDS.toMillis(ss);
    intMillis -= secondsMillis;

    String stringInterval = "%02d days - %02d:%02d:%02d.%03d";
    return String.format(stringInterval , dd, hh, mm, ss, intMillis);
  }

Shorter Form!

  public static String getIntervalTime(long longInterval) {

    long intMillis = longInterval;
    long dd = TimeUnit.MILLISECONDS.toDays(intMillis);
    intMillis -= TimeUnit.DAYS.toMillis(dd);
    long hh = TimeUnit.MILLISECONDS.toHours(intMillis);
    intMillis -= TimeUnit.HOURS.toMillis(hh);
    long mm = TimeUnit.MILLISECONDS.toMinutes(intMillis);
    intMillis -= TimeUnit.MINUTES.toMillis(mm);
    long ss = TimeUnit.MILLISECONDS.toSeconds(intMillis);
    intMillis -= TimeUnit.SECONDS.toMillis(ss);

    String stringInterval = "%02d days - %02d:%02d:%02d.%03d";
    return String.format(stringInterval , dd, hh, mm, ss, intMillis);
  }

Testing

long delay = 1000*60*20 + 1000*5 + 10;
LOGGER.log(Level.INFO, "Delay Expected {0}", getIntervalTime(delay));

Output

INFO: Delay Expected 00 days - 00:20:05.010