Java's Calendar class calendar

1.Calendar class calendar, time information packaged as a static member variables, is an abstract class.

Get the current time

1  // get the current time 
2      Calendar C = Calendar.getInstance ();
 . 3      System.out.println (C); // a java.util.GregorianCalendar [Time = 1,577,343,828,788,

2. The method of operating time obtained by:

2.1  get

1      // current operating time 
2      int m = c.get (the Calendar.MONTH);
 . 3      System.out.println (m); // get the month, it should +1

2.2  add

1  // current time plus or minus 
2      c.add (the Calendar.MONTH, 1);

2.3 gettime      

java cal.get (Calendar.DATE) and the difference between the Calendar.DATE: Calendar.DATE this thing is not the log, which is just a constant java Calendar defined, corresponding to the date for taking out key,

1  // get the current time 
2      Calendar C = Calendar.getInstance ();
 . 3      c.getTime (); // get // Date object month from 0, 
. 4      System.out.println (C);
 . 5      the SimpleDateFormat CC = new new the SimpleDateFormat ( "the mM-dd-YYYY HH: mm: the SS" );
 . 6      System.out.println (cc.format (c.getTime ())); // month obtained at this time is normal month 2019-12-26 15: 17: 640

2.4set set to the current time value specified

1  // get the current time 
2      Calendar C = Calendar.getInstance ();
 . 3      c.set (1992,. 9, 02, 12 is, 12 is, 12 is );
 . 4      // to set the current time value specified 
. 5      the System.out. println (c);

DATE / DATE OF MONTH: The first few days were a month