Dates and Times - Beginning Java 8 Fundamentals - page 463

Formatting date: 2012-04-30
M/d/yyyy: 4/30/2012
MM/dd/yyyy: 04/30/2012
MMM dd, yyyy: Apr 30, 2012
MMMM dd, yyyy: April 30, 2012
EEEE, MMMM dd, yyyy: Monday, April 30, 2012
'Month' q 'in' QQQ: Month 2 in Q2
[MM-dd-yyyy][' at' HH:mm:ss]: 04-30-2012

Formatting time:16:30:05.000078899
HH:mm:ss: 16:30:05
KK:mm:ss a: 04:30:05 PM
[MM-dd-yyyy][' at' HH:mm:ss]: at 16:30:05

Formatting zoned datetime:2012-04-30T16:30:05.000078899-05:00[America/Chicago]
MM/dd/yyyy HH:mm:ssXXX: 04/30/2012 16:30:05-05:00
MM/dd/yyyy VV: 04/30/2012 America/Chicago
[MM-dd-yyyy][' at' HH:mm:ss]: 04-30-2012 at 16:30:05

Using Locale Specific Formats
The DateTimeFormatter class has several methods that return a DateTimeFormatter with a predefined formatting
pattern suitable for humans to read. Use the following methods to obtain a reference to such formatters:

DateTimeFormatter ofLocalizedDate(FormatStyle dateStyle) •

DateTimeFormatter ofLocalizedDateTime(FormatStyle dateTimeStyle) •

DateTimeFormatter ofLocalizedDateTime(FormatStyle dateStyle, FormatStyle
timeStyle)

•

DateTimeFormatter ofLocalizedTime(FormatStyle timeStyle)
These methods accept an argument of FormatStyle enum type, which has four constants: SHORT , MEDIUM , LONG ,
and FULL . These constants are used to output formatted date and time with a varying degree of detail. The details in
the output are locale-specific. The methods use the system default locale. For a different locale, use the withLocal()
method to obtain a new DateTimeFormatter with the specified locale.
Listing 12-25 shows how to use some predefined locale-specific formats. It formats dates and times in US
(default), German, and Indian locales.

•

Listing 12-25. Using Predefined Format Patterns

// LocalizedFormats.java
package com.jdojo.datetime;

import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.Month;
import java.time.format.DateTimeFormatter;
import static java.time.format.FormatStyle.FULL;