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!

Answer 1

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 .

Answer 2

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;
}

Answer 3

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());
}

Answer 4

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!

Answer 5

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

Answer 6

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