Java class on time

　　A, Date class

　　　　1, the configuration of the method:

　　　　　　The first: Date time = new Date (): Get the current time Date 　　

 

 

 　　　　　　　  The second: Date time = new Date (long date);

   　　　　　　　　　　　Date time = new Date(10000000000L)： 　　

 

　　　　　　2, a common method

　　　　　　　　　　long time = time.getTime (); return value corresponding to the time in milliseconds.

 

　　　Two, DateFormat type (format date)

　　　Notes: This is an abstract class, can not be instantiated, use subclasses

　　　　　　= New new SDF the SimpleDateFormat  the SimpleDateFormat (time format);

　　　　　　

 

 

 　　　　　　sdf.format(Date date)：传入Date类型 返回被格式化的字符串

　　　　　　 sdf.parse (String str): Returns the specified string passed in a Date type. Note: The string to be passed in accordance with the specified date format

　　　　

　　　　Three, Calendar class (class calendar)

　　　　Notes: This is an abstract class, to be called getInstance () method returns the Calendar class 

　　　1, the common method

　　　　　　add (int field, int amount): The first parameter is a field to be operated, the second parameter is the number of offset.

 

　　　　　　　　set (): method to set the time. A plurality of overload, may be provided

 　　　　　　　　　　　

 

　　　　　　　　getTime (): returns a Date object

 

 

 

note:

West began the week of Sunday, China Monday.

In the Calendar class, the representation of a month is 0-11 representatives from January to December.