Java Date Format
There are two classes for formatting date in
java: DateFormat and SimpleDateFormat.
The java.text.DateFormat class provides various
methods to format and parse date and time in java in language independent
manner. The DateFormat class is an abstract class. java.text.Format is the
parent class and java.text.SimpleDateFormat is the subclass of
java.text.DateFormat class.
In java, converting date into string is called
formatting and vice-versa parsing. In other words, formatting means
date to string and parsing means string to date.
java.text.DateFormat Fields
1. protected Calendar calendar
2. protected NumberFormat numberFormat
3. public static final int ERA_FIELD
4. public static final int YEAR_FIELD
5. public static final int MONTH_FIELD
6. public static final int DATE_FIELD
7. public static final int HOUR_OF_DAY1_FIELD
8. public static final int HOUR_OF_DAY0_FIELD
9. public static final int MINUTE_FIELD
10. public static final int SECOND_FIELD
11. public static final int MILLISECOND_FIELD
12. public static final int DAY_OF_WEEK_FIELD
13. public static final int DAY_OF_YEAR_FIELD
14. public static final int DAY_OF_WEEK_IN_MONTH_FIELD
15. public static final int WEEK_OF_YEAR_FIELD
16. public static final int WEEK_OF_MONTH_FIELD
17. public static final int AM_PM_FIELD
18. public static final int HOUR1_FIELD
19. public static final int HOUR0_FIELD
20. public static final int TIMEZONE_FIELD
21. public static final int FULL
22. public static final int LONG
23. public static final int MEDIUM
24. public static final int SHORT
25. public static final int DEFAULT
java.text.DateFormat Methods
|
No.
|
Public Method
|
Description
|
|
1)
|
final
String format(Date date)
|
converts
given Date object into string.
|
|
2)
|
Date
parse(String source)throws ParseException
|
converts
string into Date object.
|
|
3)
|
static
final DateFormat getTimeInstance()
|
returns
time formatter with default formatting style for the default locale.
|
|
4)
|
static
final DateFormat getTimeInstance(int style)
|
returns
time formatter with the given formatting style for the default locale.
|
|
5)
|
static
final DateFormat getTimeInstance(int style, Locale locale)
|
returns
time formatter with the given formatting style for the given locale.
|
|
6)
|
static
final DateFormat getDateInstance()
|
returns
date formatter with default formatting style for the default locale.
|
|
7)
|
static
final DateFormat getDateInstance(int style)
|
returns
date formatter with the given formatting style for the default locale.
|
|
8)
|
static
final DateFormat getDateInstance(int style, Locale locale)
|
returns
date formatter with the given formatting style for the given locale.
|
|
9)
|
static
final DateFormat getDateTimeInstance()
|
returns
date/time formatter with default formatting style for the default locale.
|
|
10)
|
static
final DateFormat getDateTimeInstance(int dateStyle,int timeStyle)
|
returns
date/time formatter with the given date formatting style and time formatting
style for the default locale.
|
|
11)
|
static
final DateFormat getDateTimeInstance(int dateStyle, int timeStyle, Locale
locale)
|
returns
date/time formatter with the given date formatting style and time formatting
style for the given locale.
|
|
12)
|
static
final DateFormat getInstance()
|
returns
date/time formatter with short formatting style for date and time.
|
|
13)
|
static
Locale[] getAvailableLocales()
|
returns
an array of available locales.
|
|
14)
|
Calendar
getCalendar()
|
returns
an instance of Calendar for this DateFormat instance.
|
|
15)
|
NumberFormat
getNumberFormat()
|
returns
an instance of NumberFormat for this DateFormat instance.
|
|
16)
|
TimeZone
getTimeZone()
|
returns
an instance of TimeZone for this DateFormat instance.
|
Java DateFormat Example: Date to String
Let's see the simple example to format
date and time in java using java.text.DateFormat class.
1. import java.text.DateFormat;
2. import java.util.Date;
3. public class DateFormatExample {
4. public static void main(String[] args) {
5. Date currentDate = new Date();
6. System.out.println("Current Date: "+currentDate);
7. String dateToStr = DateFormat.getInstance().format(currentDate);
8. System.out.println("Date Format using getInstance(): "+dateToStr);
9. }
10. }
Output:
Current Date: Tue Mar 31
14:37:23 IST 2015
Date Format using
getInstance(): 31/3/15 2:37 PM
Let's see the full example to format
date and time in java using java.text.DateFormat class.
1. import java.text.DateFormat;
2. import java.util.Date;
3. public class DateFormatExample2 {
4. public static void main(String[] args) {
5. Date currentDate = new Date();
6. System.out.println("Current Date: "+currentDate);
7.
8. String dateToStr = DateFormat.getInstance().format(currentDate);
9. System.out.println("Date Format using getInstance(): "+dateToStr);
10.
11. dateToStr = DateFormat.getDateInstance().format(currentDate);
12. System.out.println("Date Format using getDateInstance(): "+dateToStr);
13.
14. dateToStr = DateFormat.getTimeInstance().format(currentDate);
15. System.out.println("Date Format using getTimeInstance(): "+dateToStr);
16.
17. dateToStr = DateFormat.getDateTimeInstance().format(currentDate);
18. System.out.println("Date Format using getDateTimeInstance(): "+dateToStr);
19.
20. dateToStr = DateFormat.getTimeInstance(DateFormat.SHORT).format(currentDate);
21. System.out.println("Date Format using getTimeInstance(DateFormat.SHORT): "+dateToStr);
22.
23. dateToStr = DateFormat.getTimeInstance(DateFormat.MEDIUM).format(currentDate);
24. System.out.println("Date Format using getTimeInstance(DateFormat.MEDIUM): "+dateToStr);
25.
26. dateToStr = DateFormat.getTimeInstance(DateFormat.LONG).format(currentDate);
27. System.out.println("Date Format using getTimeInstance(DateFormat.LONG): "+dateToStr);
28.
29. dateToStr = DateFormat.getDateTimeInstance(DateFormat.LONG,DateFormat.SHORT).format(currentDate);
30. System.out.println("Date Format using getDateTimeInstance(DateFormat.LONG,DateFormat.SHORT): "+dateToStr);
31.
32. }
33. }
Output:
Current Date: Tue Mar 31
14:37:23 IST 2015
Date Format using
getInstance(): 31/3/15 2:37 PM
Date Format using
getDateInstance(): 31 Mar, 2015
Date Format using
getTimeInstance(): 2:37:23 PM
Date Format using
getDateTimeInstance(): 31 Mar, 2015 2:37:23 PM
Date Format using
getTimeInstance(DateFormat.SHORT): 2:37 PM
Date Format using
getTimeInstance(DateFormat.MEDIUM): 2:37:23 PM
Date Format using
getTimeInstance(DateFormat.LONG): 2:37:23 PM IST
Date Format using
getDateTimeInstance(DateFormat.LONG,DateFormat.SHORT): 31 March, 2015 2:37 PM
Java DateFormat Example: String to Date
Let's see the simple example to convert
string into date using java.text.DateFormat class.
1. import java.text.DateFormat;
2. import java.util.Date;
3. public class DateFormatExample3 {
4. public static void main(String[] args)throws Exception {
5. Date d = DateFormat.getDateInstance().parse("31 Mar, 2015");
6. System.out.println("Date is: "+d);
7. }
8. }
Output:
Date is: Tue Mar 31
00:00:00 IST 2015
No comments:
Post a Comment