Formatting date and time inputs into Date object

Question

Using HTML for client side and JAVA for server side, Im trying to convert two text inputs into a Date object in java. my first input should hold the date in format DD/MM/YYYY and my second should have time HH:MM formatted.

What ive tried was using input type="text" for both, but im unable to form the object properly on the server's side.

Could you please provide me a simple example for doing that properly? Please ignore any validations and of course and you can assume my main problem is the parsing itself.

how do you that while combining them both and keeping only single Date object? — Popokoko
– Popokoko, Commented Jan 9, 2014 at 14:28
Grab both of them, concatenate the data into a string or something, then parse them according to a certain format which you specified beforehand which matches the pattern of the string you created from both of the values. There's a reference to the patterns: here Check the Example section there for actual examples containing both date and time. — Ceiling Gecko
– Ceiling Gecko, Commented Jan 9, 2014 at 14:29

Elliott Frisch · Accepted Answer · 2014-01-09 15:11:59Z

2

You can do it with a DateFormat (even a SimpleDateFormat) like so

private static String DATE_PART = "dd/MM/yyyy";
private static String HOUR_PART = "HH:mm";
private static java.text.DateFormat FORMAT = 
    new java.text.SimpleDateFormat(DATE_PART + " " + HOUR_PART);
private static java.text.DateFormat HOUR_FORMAT = 
    new java.text.SimpleDateFormat(HOUR_PART);
private static java.text.DateFormat DATE_FORMAT = 
    new java.text.SimpleDateFormat(DATE_PART);

public static Date fromStrings(String date, String time) {
    StringBuilder sb = new StringBuilder(date);
    sb.append(" ").append(time);
    try {
        return FORMAT.parse(sb.toString());
    } catch (ParseException e) {
        e.printStackTrace();
    }
    return null;
}
public static void main(String[] args) {
    String date ="09/01/2014";
    String time ="16:05";
    java.util.Date dt = fromStrings(date, time);
    System.out.println(dt);
    System.out.println(DATE_FORMAT.format(dt));
    System.out.println(HOUR_FORMAT.format(dt));
}

Which outputs

Thu Jan 09 09:28:00 EST 2014
09/01/2014
16:05

edited Jan 9, 2014 at 15:11

answered Jan 9, 2014 at 14:38

Elliott Frisch

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6 Comments

Popokoko Over a year ago

hmm, there's a slight bug, i tried DD/MM/YYYY and HH:MM instead of your pattern and while using the fromString im getting something bit different then what ive expected

Elliott Frisch Over a year ago

Read the format again (it's documented at that link).. "MM" is month in year, "mm" is minutes of day (and capitalization is significant).

Popokoko Over a year ago

So it might be not related to your solution but to my understanding. I used "09/01/2014" and "16:05" and recieved a corrected "2014-01-09T16:05:00+02:00" object. now, while trying to formating it i used: new SimpleDateFormat("dd/MM/yyyy HH:mm").format(date); but i recieved as a result: 09/01/2014 16:01, Ain't sure about why the 01 appears at the end.

Elliott Frisch Over a year ago

It works for me - String date ="09/01/2014"; and String time ="16:05"; and java.util.Date dt = fromStrings(date, time); outputs Thu Jan 09 16:05:00 EST 2014.

Popokoko Over a year ago

Your logic is correct but after im getting a Date object I'm trying to string it back to a separated form using SimpleDateFormat. Am I missing something?

|

Vaelyr · Accepted Answer · 2014-01-09 15:01:32Z

1

String date = "dd/MM/yyyy"; // your date value from user input
String hour = "HH:mm"; // your hour value from user input    

try {
    DateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy HH:mm");

    String tempDate = date + " " + hour;
    Date result = dateFormat.parse(tempDate);
    } catch (ParseException e) {
        e.printStackTrace();
    }

Extract it into a method if you wish.

answered Jan 9, 2014 at 15:01

Vaelyr

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