Date Formattin in Java.

Things to remember for Simple Date FOrmatting


Letter Date or Time Component Presentation Examples
G Era designator Text AD
y Year Year 1996; 96
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 in week Text Tuesday; Tue
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


For Addtional Processing use the following:
Date and Time Pattern Result
"yyyy.MM.dd G 'at' HH:mm:ss z" 2001.07.04 AD at 12:08:56 PDT
"EEE, MMM d, ''yy" Wed, Jul 4, '01
"h:mm a" 12:08 PM
"hh 'o''clock' a, zzzz" 12 o'clock PM, Pacific Daylight Time
"K:mm a, z" 0:08 PM, PDT
"yyyyy.MMMMM.dd GGG hh:mm aaa" 02001.July.04 AD 12:08 PM
"EEE, d MMM yyyy HH:mm:ss Z" Wed, 4 Jul 2001 12:08:56 -0700
"yyMMddHHmmssZ" 010704120856-0700



Sample Code for conversion:

String datefromTable="2/22/2007 6:46:15 PM";
SimpleDateFormat sdf = new SimpleDateFormat("MM/dd/yyyy KK:mm:ss aaa");

SimpleDateFormat sdf2= new SimpleDateFormat("dd MMM yyyy hh:mm:ss");

String fromFile="23 Feb 2007 12:21:12";

java.util.Date d=null;
java.util.Date d2=null;
try{
d=sdf.parse(datefromTable);
d2=sdf2.parse(fromFile);
}catch(Exception e){

e.printStackTrace();
}


System.out.println("Compare Dates : "+d.compareTo(d2));