Convert seconds value to hours minutes seconds?

Question

I've been trying to convert a value of seconds (in a BigDecimal variable) to a string in an editText like "1 hour 22 minutes 33 seconds" or something of the kind.

I've tried this:

String sequenceCaptureTime = "";
BigDecimal roundThreeCalc = new BigDecimal("0");
BigDecimal hours = new BigDecimal("0");
BigDecimal myremainder = new BigDecimal("0");
BigDecimal minutes = new BigDecimal("0");
BigDecimal seconds = new BigDecimal("0");
BigDecimal var3600 = new BigDecimal("3600");
BigDecimal var60 = new BigDecimal("60");

(I have a roundThreeCalc which is the value in seconds so I try to convert it here.)

hours = (roundThreeCalc.divide(var3600));
myremainder = (roundThreeCalc.remainder(var3600));
minutes = (myremainder.divide(var60));
seconds = (myremainder.remainder(var60));
sequenceCaptureTime =  hours.toString() + minutes.toString() + seconds.toString();

Then I set the editText to sequnceCaptureTime String. But that didn't work. It force closed the app every time. I am totally out of my depth here, any help is greatly appreciated. Happy coding!

Solution 1

You should have more luck with

hours = roundThreeCalc.divide(var3600, BigDecimal.ROUND_FLOOR);
myremainder = roundThreeCalc.remainder(var3600);
minutes = myremainder.divide(var60, BigDecimal.ROUND_FLOOR);
seconds = myremainder.remainder(var60);

This will drop the decimal values after each division.

Edit: If that didn't work, try this. (I just wrote and tested it)

public static int[] splitToComponentTimes(BigDecimal biggy)
{
    long longVal = biggy.longValue();
    int hours = (int) longVal / 3600;
    int remainder = (int) longVal - hours * 3600;
    int mins = remainder / 60;
    remainder = remainder - mins * 60;
    int secs = remainder;

    int[] ints = {hours , mins , secs};
    return ints;
}

Solution 2

Is it necessary to use a BigDecimal? If you don't have to, I'd use an int or long for seconds, and it would simplify things a little bit:

hours = totalSecs / 3600;
minutes = (totalSecs % 3600) / 60;
seconds = totalSecs % 60;

timeString = String.format("%02d:%02d:%02d", hours, minutes, seconds);

You might want to pad each to make sure they're two digit values(or whatever) in the string, though.

Solution 3

DateUtils.formatElapsedTime(long), formats an elapsed time in the form "MM:SS" or "H:MM:SS" . It returns the String you are looking for. You can find the documentation here

Solution 4

Something really helpful in Java 8

import java.time.LocalTime;

private String ConvertSecondToHHMMSSString(int nSecondTime) {
    return LocalTime.MIN.plusSeconds(nSecondTime).toString();
}

Solution 5

Here is the working code:

private String getDurationString(int seconds) {

    int hours = seconds / 3600;
    int minutes = (seconds % 3600) / 60;
    seconds = seconds % 60;

    return twoDigitString(hours) + " : " + twoDigitString(minutes) + " : " + twoDigitString(seconds);
}

private String twoDigitString(int number) {

    if (number == 0) {
        return "00";
    }

    if (number / 10 == 0) {
        return "0" + number;
    }

    return String.valueOf(number);
}

View more solutions

Comments

[Richard Schneider]

possible duplicate of How to convert Milliseconds to "X mins, x seconds" in Java?

[Ted Hopp]

Any reason why you are using BigDecimal instead of BigInteger?

[rabbitt]

I will have to implement fractions of a second later on in dev, right now I am just trying to get the calculation to work in the first place.

[Ben J]

I second Richard's comment - you can use the TimeUnit enum to do a lot of the work for you. developer.android.com/reference/java/util/concurrent/…

[rabbitt]

How would I go about using timeunit to convert from a BigDecimal with seconds in it to HHMMSS?

[rabbitt]

I will have to implement fractions of a second later on in dev, right now I am just trying to get the calculation to work in the first place.

[Alex Kucherenko]

This solution is more graceful: stackoverflow.com/questions/625433/…

[Hakem Zaied]

I like this answer but you need to change '% 10' to '/ 10'

[Jeffrey Blattman]

String.format("%02d:%02d:%02d", hours, minutes, seconds);

[2Dee]

You could further improve your answer by explaining what the code does and how it solves the problem ;-)

[Nabin]

This one is simple and exactly what I need. I recommend others this method

[PSo]

This is simply impressive. I wonder how modulus could work in this way.

[Pratik Butani]

Use Locale otherwise it will gives you warning. String.format(Locale.ENGLISH, "%02d:%02d:%02d", hours, minutes, seconds)

[Bob]

@AlexKucherenko except that solution works with milliseconds

[Hossein Kurd]

shortest Answer , Awesome

[Amir Omidi]

@Mikhail TimeUnit.#### will allow you to do it with any unit of time.

[karthi]

Note: The calculation wraps around midnight when using plusSeconds(long seconds), for eg: if seconds is 86400(24 hrs) it outputs 00:00.

[Epicurist]

It does exactly what the name suggests 'ConvertSecondToHHMMSSString'. The other (tedious) solutions are also wrapping around.

[kiranking]

Don't forget that it expect parameter in seconds. So you need to convert millis to seconds

[Paulo Oliveira]

@Epicurist this was the solution I was looking for! Much more elegant and than all the others! :)

[Epicurist]

Why this infant way using Double typed variables to store the necessary ints?

[dovetalk]

Whenever you find yourself doing math with time and date values, you need to stop yourself and find the right API in the language at hand. If you just need a HH:MM:SS-type response, you'll be better off with DateUtils.formatElapsedTime...

[dovetalk]

Whenever you find yourself doing math with time and date values, you need to stop yourself and find the right API in the language at hand. If you just need a HH:MM:SS-type response, you'll be better off with DateUtils.formatElapsedTime...

[dovetalk]

Whenever you find yourself doing math with time and date values, you need to stop yourself and find the right API in the language at hand. If you just need a HH:MM:SS-type response, you'll be better off with DateUtils.formatElapsedTime...

[Geobits]

@dovetalk That can definitely be useful, and was added as a separate answer several years ago.

[dovetalk]

@Geobits, yes, and thanks for linking to it. I spammed many of the "solutions" here with that comment to raise awareness to less experienced developers that are likely to be tempted to roll-their-own. There are some domains where that is generally a bad idea. Time arithmetic is one

[Geobits]

@dovetalk In general yes, but seconds/minutes are mostly safer than days/years by a long shot. As usual, a lot of ways to do a simple thing.

[D-Klotz]

this should be the accepted answer as it is cleaner and the hours calculation will show the actual total hours instead of a % mod value of hours.

[Bruno Bieri]

The provided code won't work as I would expect if you have more seconds than 24 hours.

[Lahiru Chandima]

Wouldn't work when hour count exceeds 24