CODEWITHSUNDEEP
javadatetime
nKognito
nKognito

Reputation: 6363

Update time only

Is there any way to update only a Date's time path? I tried Date.setTime() but it replaces the date path too. I there any java method or the only way is to set hour, minute, second and milisecond?

Thank you

Upvotes: 0

Views: 113

Answers (3)

Ted Hopp
Ted Hopp

Reputation: 234817

A Java Date is just a wrapper around a long that counts time from the epoch (January 1, 1970). Much more flexible is Calendar. You can create a Calendar from a Date:

Date date = . . .;
Calendar cal = new GregorianCalendar();
cal.setTime(date);

Then you can set various fields of the Calendar:

cal.set(Calendar.HOUR_OF_DAY, 8);
// etc.

Upvotes: 4

MadProgrammer
MadProgrammer

Reputation: 347284

You'll want to take a look at java.util.Calender.

It will allow you to change the individual parts of the date/time.

Calendar cal = Calender.getInstance();
cal.setTime(date);
cal.set(Calender.HOUR, hour);

Alternatively, as has already being suggested, I'd take a look at Joda Time

Upvotes: 1

Jon Skeet
Jon Skeet

Reputation: 1501163

I would start by moving away from java.util.Date entirely. Ideally, use Joda Time as it's a far more capable date/time library.

Otherwise, you should use java.util.Calendar. A java.util.Date doesn't have a particular date/time until you decide what time zone you're interested in - it just represents an instant in time, which different people around the world will consider to be a different date and time of day.

Upvotes: 3

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