Joda: Convert Date and Time to DateTime

Question

Is there a way to convert a Time and Date variable to a DateTime?

I have a period between two DateTime variables, for each Date in that period I want to store a period IN that Date with a begin DateTime and end DateTime, so a day can have multiple periods defined by a DateTime.

Can't seem to figure out how to combine Date and Time to a DateTime.

Thanks in advance!

What *exactly* do you mean by "a Time and Date variable"? It would be much easier if you would show us code rather than describing it. — Jon Skeet, Mar 07 '13 at 15:56
java.sql.Time beginTime and java.sql.Date beginDate, I want to form a dateTime from them — Luc, Mar 08 '13 at 08:41
Luc - give us an example of what you want to do. makes things clearer. — david blaine, Mar 10 '13 at 18:22
Possible duplicate of [Convert from java.util.date to JodaTime](http://stackoverflow.com/questions/5042587/convert-from-java-util-date-to-jodatime) — Danielson, Oct 10 '15 at 13:38

score 11 · Answer 1 · edited Dec 30 '13 at 23:23

11

Plain java Date and Joda-Time DateTime should serve the purpose.

Date date = new Date(); // java.util.Date; - This date has both the date and time in it already.
DateTime dateTime = new DateTime(date);

For more info about Joda-Time.

If you have two String objects, where 1 holds the Date and the other Time, you can combine the 2 Strings and use a SDF to parse it and get the Date object, which you can then convert to DateTime.

edited Dec 30 '13 at 23:23

Basil Bourque

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answered Mar 07 '13 at 15:55

Rahul

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Regarding that last paragraph… If you include a `T` between that date and time ([standard format](https://en.wikipedia.org/wiki/ISO_8601)), you can pass the string directly to a constructor of [DateTime](http://www.joda.org/joda-time/apidocs/org/joda/time/DateTime.html). No need to use the SimpleDateFormat & Date classes. Just a single line of code. Like this… `DateTime dateTime = new DateTime( "2013-01-02T03:04:05", DateTimeZone.UTC );` – Basil Bourque Dec 30 '13 at 23:25

score 5 · Accepted Answer · answered Mar 11 '13 at 11:34

Fixed it using this:

public DateTime dateAndTimeToDateTime(java.sql.Date date, java.sql.Time time) {
    String myDate = date + " " + time;
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    java.util.Date utilDate = new java.util.Date();
    try {
        utilDate = sdf.parse(myDate);
    } catch (ParseException pe){
        pe.printStackTrace();
    }
    DateTime dateTime = new DateTime(utilDate);

    return dateTime;
}

score 3 · Answer 3 · answered Apr 26 '16 at 10:27

Even if this question is a bit older and already answered, I could not find a satisfying solution. The best method for this problem is probably the following code (without any parsing and exception handling required):

public DateTime dateAndTimeToDateTime(java.sql.Date date, java.sql.Time time) {
    DateTime t = new DateTime(time);
    return new DateTime(date).withTime(t.getHourOfDay(), t.getMinuteOfHour(), t.getSecondOfMinute(), t.getMillisOfSecond());
}

score 2 · Answer 4 · edited Jan 01 '14 at 08:42

2

I am pretty sure that you can find how to construct date and time instances separately.

However on the datetime object itself you can specify the following.

dateTimeObject = dateTimeObject.withHourOfDay(12);
dateTimeObject = dateTimeObject.withMinuteofHour(59);
dateTimeObject = dateTimeObject.withSecondOfMinute(59);

Hope this helps!

edited Jan 01 '14 at 08:42

Rahul

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answered Mar 07 '13 at 16:09

r0ast3d

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score 1 · Answer 5 · answered Jul 16 '19 at 19:40

java.time

With java.time, the modern Java date and time API, this is simple and straightforward:

    LocalTime time = LocalTime.of(23, 45);
    LocalDate date = LocalDate.of(2019, Month.NOVEMBER, 23);

    LocalDateTime combined = date.atTime(time);
    System.out.println(combined);

Output is:

2019-11-23T23:45

I know you asked about Joda-Time. However, the Joda-Time homepage says:

Note that Joda-Time is considered to be a largely “finished” project. No major enhancements are planned. If using Java SE 8, please migrate to java.time (JSR-310).

Links

Oracle tutorial: Date Time explaining how to use java.time.
Joda-Time homepage

score 0 · Answer 6 · answered Jul 16 '19 at 05:10

0

DateTime dateTime = new DateTime("yyyy-MM-dd");.

System.out.println("============> " + dateTime.toString());

INPUT : 2018-01-04
OUTPUT: ============> 2018-01-05T00:00:00.000+05:30

answered Jul 16 '19 at 05:10

Kailash Karki

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It doesn’t seem to answer the question? I read it as a question of combining date *and time* . – Ole V.V. Jul 16 '19 at 06:16

Joda: Convert Date and Time to DateTime

6 Answers6

java.time

Links