Java date Plus and minus operations

Tag: Time () format system led reg operation text Val Month Day

1. Use java. util. Calender to achieve

Calendar calendar=calendar.getinstance ();
Calendar.settime (New Date ());
System.out.println (Calendar.get (Calendar.day_of_month));//Today's date
Calendar.set (Calendar.day_of_month,calendar.get (calendar.day_of_month) +1);//Let date plus 1
System.out.println (Calendar.get (calendar.date));//top of date plus 1
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2. Use Java. Text. SimpleDateFormat and Java. util. Date to implement

Date D=new date ();
SimpleDateFormat df=new SimpleDateFormat ("Yyyy-mm-dd");
System.out.println ("Today's Date:" +df.format (d));
System.out.println ("Two days ago Date:" + Df.format (new Date (D.gettime ()-2 * 24 * 60 * 60 * 1000)));
System.out.println ("Date after three days:" + df.format (new Date (D.gettime () + 3 * 24 * 60 * 60 * 1000)));

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GregorianCalendar gc=new GregorianCalendar ();
Gc.settime (new Date);
Gc.add (Field,value);
Value is positive, backward, negative, forward
Field take 1 plus 1 years, take 2 plus six months, take 3 plus one quarter, take 4 plus one week
Take 5 plus a day ....

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/*
* Addition and subtraction of dates inJava
*gc.add (1,-1) represents the year minus one.
*gc.add (2,-1) represents the month minus one.
*gc.add (3.-1) means weekly minus one.
*gc.add (5,-1) represents a day minus one.
* And so should be accurate milliseconds. No, try again. You can try it.
The Add (int field,int amount) method of the *gregoriancalendar class represents the month-date plus minus.
The *field parameter represents the year, month, and day.
The *amount parameter represents the quantity to be added and reduced.

Java date Plus and minus operations