How to format a date String into desirable Date format

Question

I was trying to format a string into date.

For this I have written a code:-

Calendar cal = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateF         


        

Answer 1

This should do it for you, remember to wrap it in a try-catch block just in case.

DateFormat dt = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss"); 
try
{
Date today = dt.parse("2010-10-22T00:00:00");                       
System.out.println("Your Date = " + dt.format(today));       
} catch (ParseException e)    
{
//This parse operation may not be successful, in which case you should handle the ParseException that gets thrown.
//Black Magic Goes Here
} 

Answer 2

The same class you use for output formatting of dates can also be used to parse dates on input.

• SimpleDateFormat reference

To use your example, to parse the sample date:

String dt = "2010-10-22";
SimpleDateFormat dateFormatter = new SimpleDateFormat("yyyy-MM-dd");
System.out.println(dateFormatter.parse(dt));

The fields that are not specified (ie. hour, minutes, etc) will be 0. So your same code can be used to format the date on output.

Answer 3

If your input is going to be ISO, you could also look at using the Joda Time API, like so:

LocalDateTime localDateTime = new LocalDateTime("2010-10-22");
System.out.println("Formatted time: " + localDateTime.toString());

Answer 4

String dt = "2010-10-22";

SimpleDateFormat sdfIn = new SimpleDateFormat("yyyy-MM-dd");
ParsePosition ps = new ParsePosition(0)
Date date = sdfIn.parse(dt, pos)

SimpleDateFormat sdfOut = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss");

System.out.println(sdfOut.format( date ));

Answer 5

Date Format Example

Containing the Conversion of String Date object from one format to another