Java Internationalization - Date Format Patterns

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Followings is the use of characters in date formatting patterns.

Sr.No. Class & Description
1

G

To display Era.
2

y

To display Year. Valid values yy, yyyy.
3

M

To display Month. Valid values MM, MMM or MMMMM.
4

d

To display day of month. Valid values d, dd.
5

h

To display hour of day (1-12 AM/PM). Valid value hh.
6

H

To display hour of day (0-23). Valid value HH.
7

m

To display minute of hour (0-59). Valid value mm.
8

s

To display second of minute (0-59). Valid value ss.
9

S

To display milliseconds of minute (0-999). Valid value SSS.
10

E

To display Day in week (e.g Monday, Tuesday etc.)
11

D

To display Day in year (1-366).
12

F

To display Day of week in month (e.g. 1st Thursday of December).
13

w

To display Week in year (1-53).
14

W

To display Week in month (0-5)
15

a

To display AM / PM
16

k

To display Hour in day (1-24).
17

K

To display Hour in day, AM / PM (0-11).
18

z

To display Time Zone.

Example

In this example, we're formatting dates based on different patterns.

 import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Date; public class I18NTester { public static void main(String[] args) throws ParseException { String pattern = "dd-MM-yy"; SimpleDateFormat simpleDateFormat = new SimpleDateFormat(pattern); Date date = new Date(); System.out.println(simpleDateFormat.format(date)); pattern = "MM-dd-yyyy"; simpleDateFormat = new SimpleDateFormat(pattern); System.out.println(simpleDateFormat.format(date)); pattern = "yyyy-MM-dd HH:mm:ss"; simpleDateFormat = new SimpleDateFormat(pattern); System.out.println(simpleDateFormat.format(date)); pattern = "EEEEE MMMMM yyyy HH:mm:ss.SSSZ"; simpleDateFormat = new SimpleDateFormat(pattern); System.out.println(simpleDateFormat.format(date)); } }

Output

It will print the following result.

 07-06-24 06-07-2024 2024-06-07 16:04:40 Friday June 2024 16:04:40.866+0530
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