May 092016

ADM

How to get date and time in Java

  • 09 May 2016
  • ADM

 

 

 

How to get date and time in Java - images/logos/java.jpg

 

In Java, when it about the date, time and formatting date is mostly about three classes: Date, Calendar, and SimpleDateFormat.

Using Date

To create a Date object containing the current data:

Date date = new Date();

Using Calendar

To create a Date object containing the current date using Calendar class:

Calendar calendar = Calendar.getInstance();
Date date2 = calendar.getTime();

Formatter

To format the date in different formats SimpleDateFormat can be used.

String FORMAT = "yyyy-MM-dd HH:mm:ss";
DateFormat formater = new SimpleDateFormat(FORMAT);

Here are some formats examples.

Date and Time Pattern Result
"yyyy.MM.dd G 'at' HH:mm:ss z" 2001.07.04 AD at 12:08:56 PDT
"EEE, MMM d, ''yy" Wed, Jul 4, '01
"h:mm a" 12:08 PM
"hh 'o''clock' a, zzzz" 12 o'clock PM, Pacific Daylight Time
"K:mm a, z" 0:08 PM, PDT
"yyyyy.MMMMM.dd GGG hh:mm aaa" 02001.July.04 AD 12:08 PM
"EEE, d MMM yyyy HH:mm:ss Z" Wed, 4 Jul 2001 12:08:56 -0700
"yyMMddHHmmssZ" 010704120856-0700
"yyyy-MM-dd'T'HH:mm:ss.SSSZ" 2001-07-04T12:08:56.235-0700
"yyyy-MM-dd'T'HH:mm:ss.SSSXXX" 2001-07-04T12:08:56.235-07:00
"YYYY-'W'ww-u" 2001-W27-3

Example

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

public class DateTests {
	
	public static void main(String[] args) {
		String FORMAT = "yyyy-MM-dd HH:mm:ss";
		DateFormat formater = new SimpleDateFormat(FORMAT);
		
		System.out.println("Date Formater Example");
		System.out.println();
		
		Date date1 = new Date();	
		System.out.println("Using Date: " + formater.format(date1));
		System.out.println();
		
		Calendar calendar = Calendar.getInstance();
		Date date2 = calendar.getTime();
		System.out.println("Using Calendar: " +formater.format(date2));
	}
}

Output

Date Formater Example

Using Date: 2016-05-05 16:02:13

Using Calendar: 2016-05-05 16:02:13

 

 

 

References