javase--Date Calendar class

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System.currenttimemillis ()

This method is the actual way to get the system time.

Java.util.Date

Date class, you can convert the time type of long integer format Currenttimemillis () to our readable date format.

CompareTo () time comparison method;

Examples:

Java.util.Calendar

Calendar class

Common methods:

Getactualmaximum ();//Get the actual maximum number, depending on the parameters given to obtain the day of the year or the day of the month and so on.

Get ()//Get the thought of the date according to the parameters and so on

Add (); Add a number to the calendar, the preceding parameter is: Year/month/day/time Division/second one, after the free parameter is to add the value.

For example: How many days is it now from the Chinese New Year?

Output Result:

309 days from the New Year

SimpleDateFormat Calendar Format Class

For example:

Output Result:

February 25, 2018 18:46 07 sec Sunday pm

javase--Date Calendar class