Add time to string data/time

Question

I am trying to pass a time stamp to my API that comes in the format of YYYY-MM-DD HH:MM:SS but i need to manipulate the time to add 5 hours.

Have I done something wrong here? Do I need to convert it to a JavaScript date first?

var manDate = "2020-08-16 16:15:00"
manDate.setHours(manDate.getHours() + 5);
data.manDate = manDate
console.log(manDate)

Expected output - 2020-08-16 21:15:00

Refer this example : https://stackoverflow.com/questions/3581258/adding-n-hours-to-a-date-in-java — Adya, Aug 17 '20 at 05:40

score 2 · Accepted Answer · answered Aug 17 '20 at 05:54

When you create a var for date, you need to add the 'new Date()' method.

var manDate = new Date("2020-08-16 16:15:00");
manDate.setHours(manDate.getHours() + 5);
console.log(manDate.getHours());

And to log the hours use getHour() again in the log statement.

Lahiru Wijesekara · Answer 2 · 2020-08-17T05:49:57.573

1

The question was asked to give a solution in java earlier. Below is the answer as per java.

Date newDate = DateUtils.addHours(oldDate, 5);

edited Aug 17 '20 at 05:49

answered Aug 17 '20 at 05:42

Lahiru Wijesekara

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It's not a Java question, OP meant JavaScript apparently. – VLAZ Aug 17 '20 at 05:42
1

Also, at the very least it's worth mentioning that `DateUtils` is the Apache package, not core Java. – VLAZ Aug 17 '20 at 05:44

score 1 · Answer 3 · answered Aug 17 '20 at 05:48

Use simpleDateFormat to format the date, then cast the formatted date to calendar and add hours to it.

Try with below code.

SimpleDateFormat sdfObj = new SimpleDateFormat("yyyy.MM.dd HH:mm:ss");
sdfObj.parse("2020-08-16 16:15:00");                   
Calendar calendar = sdfObj.getCalendar();
calendar.add(Calendar.HOUR_OF_DAY, 5);

Add time to string data/time

3 Answers3