JAVA : date time

import file 

import java.text.DateFormat;
import java.text.SimpleDateFormat;

String to date

   DateFormat df = new SimpleDateFormat(dateFormat);
   Sting date ="";
   Date dt= df.parse(date);

Date to String

SimpleDateFormat sdf = new SimpleDateFormat(dateFormat);
Date date = ;
String dt = sdf.format(date)

* dateFormat such as "DD-MM-YYYY"

Symbol	Meaning	Presentation	Example
G	era designator	(Text)	AD
y	year	(Number)	1996
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)	1
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