Java Date Format Examples

Posted in: Java Date Format Examples

How to compare dates in java

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package basics;   import java.text.DateFormat; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Date;   public class DateExamples {   public static void main(String[] args) {  System.out.println(DateExamples.isDateGreaterThanToday("2/07/2010")); }   public static boolean isDateGreaterThanToday(String date) {  boolean results = true;    DateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy");  if (date != null && !date.trim().equals("")) {   try {    Date dateToBeCompared = dateFormat.parse(date);    Date today = new Date();    if (today.compareTo(dateToBeCompared) > 0) {     results = false;    }   } catch (ParseException e) {    e.printStackTrace();    results = true;   }  }  return results; } }

2.How to format date in java

Symbol	Meaning	Presentation	Example
G	era designator	Text	AD
y	year	Number	2009
M	month in year	Text & Number	July & 07
d	day in month	Number	10
h	hour in am/pm (1-12)	Number	12
H	hour in day (0-23)	Number	0
m	minute in hour	Number	30
s	second in minute	Number	55
S	millisecond	Number	978
E	day in week	Text	Tuesday
D	day in year	Number	189
F	day of week in month	Number	2 (2nd Wed in July)
w	week in year	Number	27
W	week in month	Number	2
a	am/pm marker	Text	PM
k	hour in day (1-24)	Number	24
K	hour in am/pm (0-11)	Number	0
z	time zone	Text	Pacific Standard Time
'	escape for text	Delimiter	(none)
'	single quote	Literal	'

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package basics;   import java.text.SimpleDateFormat; import java.util.Date;   public class DateFormatExample {   public static void main(String[] args) {   SimpleDateFormat formatter = null; Date date = new Date();   formatter = new SimpleDateFormat("MM/dd/yy"); String s = formatter.format(date); // Example 07/02/10   System.out.println(s);   formatter = new SimpleDateFormat("dd-MMM-yy"); s = formatter.format(date);// 02-Jul-10 System.out.println(s);   formatter = new SimpleDateFormat("yyyy.MM.dd.HH.mm.ss"); s = formatter.format(date); // 2010.07.02.21.32.35 System.out.println(s);   formatter = new SimpleDateFormat("E, dd MMM yyyy HH:mm:ss Z"); s = formatter.format(date); // Fri, 02 Jul 2010 21:32:35 +0800 System.out.println(s);   formatter.applyPattern("EEE, MMM d, ''yy"); s = formatter.format(date); // Fri, Jul 2, '10 System.out.println(s);   formatter.applyPattern("hh 'o''clock' a, zzzz"); s = formatter.format(date); // 09 o'clock PM, Singapore Time System.out.println(s);   formatter.applyPattern("yyyy.MMMMM.dd GGG hh:mm aaa"); s = formatter.format(date); // 2010.July.02 AD 09:39 PM System.out.println(s); } }