10_Date-Calendar.txt

Date time:

Date d = new Date();
d.toString();

SimpleDateFormat sdf = new SimpleDateFormat();



Letter 	Date or Time Component 	Presentation 	Examples
G 	Era designator 	Text 	AD
y 	Year 	Year 	1996; 96
Y 	Week year 	Year 	2009; 09
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 name in week 	Text 	Tuesday; Tue
u 	Day number of week (1 = Monday, ..., 7 = Sunday) 	Number 	1
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
X 	Time zone 	ISO 8601 time zone 	-08; -0800; -08:00

Same goes with Caelndar class, but it has different functionalities

Calendar cal = Calendar.getInstance();
        SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/YYYY HH:mm:ss");
        System.out.println(sdf.format(cal.getTime()));
        System.out.println(cal.get(Calendar.DAY_OF_MONTH));