How to get current date and time in java

By using SimpleDateFormat and Date/Calendar class, we can easily get current date and time in Java. In this tutorial we will see how to get the current date and time using Date and Calendar class and how to get it in the desired format using SimpleDateFormat class.

Current date and time in Java – Two ways to get it

1) Using Date class

• Specify the desired pattern while creating the instance of SimpleDateFormat.
• Create an object of Date class.
• Call the format() method of DateFormat class and pass the date object as a parameter to the method.

/* This will display the date and time in the format of 
 * 12/09/2017 24:12:35. See the complete program below
 */
DateFormat df = new SimpleDateFormat("dd/MM/yy HH:mm:ss");
Date dateobj = new Date();
System.out.println(df.format(dateobj));

2) Using Calendar class

• Specify the desired pattern for the date and time. Similar to the step 1 of above method.
• Create an object of Calendar class by calling getInstance() method of it.
• Call the format() method of DateFormat and pass the Calendar.getTime() as a parameter to the method.

DateFormat df = new SimpleDateFormat("dd/MM/yy HH:mm:ss");
Calendar calobj = Calendar.getInstance();
System.out.println(df.format(calobj.getTime()));

Complete java code for getting current date and time

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

public class GettingCurrentDate {
   public static void main(String[] args) {
       //getting current date and time using Date class
       DateFormat df = new SimpleDateFormat("dd/MM/yy HH:mm:ss");
       Date dateobj = new Date();
       System.out.println(df.format(dateobj));

       /*getting current date time using calendar class 
        * An Alternative of above*/
       Calendar calobj = Calendar.getInstance();
       System.out.println(df.format(calobj.getTime()));
    }
}

Output:

21/10/17 22:13:06
21/10/17 22:13:06

Every time I run the above code it would fetch the current date and time.

Note: In order to get the output in above format I have specified the date/time pattern in the program (Note the first statement of the program DateFormat df = new SimpleDateFormat("dd/MM/yy HH:mm:ss");.

However if you want the output in any other date format, just modify the pattern accordingly. For e.g. To get the date only, the pattern would be dd-MM-yyyy: replace the statement with this one: DateFormat df = new SimpleDateFormat("dd-MM-yyyy");

While specifying the pattern be careful with the case. For e.g. ‘s’ (small s) represents second while ‘S'(Capital s) represents Millisecond.

At the end of this guide, I have shared the complete chart of symbols that we can use in patterns to get the date and time in desired format

Java – Getting current date and time in other timezone

The example we have seen above shows the date and time in local timezone. However we can get the date and time in different time zone as well such as UTC/GMT etc. In the following example we are displaying the time in GMT time zone.

import java.util.Date;
import java.text.SimpleDateFormat;
import java.util.TimeZone;
public class Example {
   public static void main(String[] args) {
	//"hh" in pattern is for 12 hour time format and "aa" is for AM/PM
	SimpleDateFormat dateTimeInGMT = new SimpleDateFormat("yyyy-MMM-dd hh:mm:ss aa");
	//Setting the time zone
	dateTimeInGMT.setTimeZone(TimeZone.getTimeZone("GMT"));
	System.out.println(dateTimeInGMT.format(new Date()));
   }
}

Output:

2017-Oct-21 06:03:42 PM

Update: To get the current date and time in Java 8 refer this guide.

Here is the complete chart which will help you to define the pattern in SimpleDateFormat.

Letter	Date or Time Component	Presentation	Examples
G	Era designator	Text	AD
y	Year	Year	1996; 96
Y	Week year	Year	2009; 09
M	Month in year	Month	July; Jul; 07
w	Week in year	Number	27
W	Week in month	Number	2
D	Day in year	Number	189
d	Day in month	Number	10
F	Day of week in month	Number	2
E	Day name in week	Text	Tuesday; Tue
u	Day number of week (1 = Monday, …, 7 = Sunday)	Number	1
a	Am/pm marker	Text	PM
H	Hour in day (0-23)	Number	0
k	Hour in day (1-24)	Number	24
K	Hour in am/pm (0-11)	Number	0
h	Hour in am/pm (1-12)	Number	12
m	Minute in hour	Number	30
s	Second in minute	Number	55
S	Millisecond	Number	978
z	Time zone	General time zone	Pacific Standard Time; PST; GMT-08:00
Z	Time zone	RFC 822 time zone	-0800
X	Time zone	ISO 8601 time zone	-08; -0800; -08:00

References:

• Calendar javadoc
• Date javadoc
• SimpleDateFormat javadoc

Related Posts:

1. Java – Display current time in Milliseconds format
2. Java – Display time in 12 hour format with AM/PM
3. Java – Convert Date to String
4. Java – Convert String to Date
5. Java – Add days to Date