LocalDateTime类getDayOfWeek()方法 (LocalDateTime Class getDayOfWeek() method)

• getDayOfWeek() method is available in java.time package.

  getDayOfWeek()方法在java.time包中可用。

• getDayOfWeek() method is used to get the field value day-of-week that is an enum DayOfWeek from this date-time object.

  getDayOfWeek()方法用于获取星期几的字段值，该字段值为该日期时间对象的枚举DayOfWeek。

• getDayOfWeek() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

  getDayOfWeek()方法是一个非静态方法，只能通过类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。

• getDayOfWeek() method does not throw an exception at the time of getting the day of the week.

  getDayOfWeek()方法在获取星期几时不会引发异常。

Syntax:

句法：

public DayOfWeek getDayOfWeek();

Parameter(s):

参数：

• None

  没有

Return value:

返回值：

The return type of this method is DayOfWeek, it returns the value day-of-week.

此方法的返回类型为DayOfWeek ，它返回星期几的值。

Example:

例：

// Java program to demonstrate the example // of getDayOfWeek() method of LocalDateTimeimport java.time.*;public class GetDayOfWeekOfLocalDateTime {
       public static void main(String args[]) {
           // Instantiates two LocalDateTime        LocalDateTime da_ti1 = LocalDateTime.parse("2005-10-05T10:10:10");        LocalDateTime da_ti2 = LocalDateTime.now();        // Display da_ti1, da_ti2        System.out.println("LocalDateTime da_ti1 and da_ti2: ");        System.out.println("da_ti1: " + da_ti1);        System.out.println("da_ti2: " + da_ti2);        System.out.println();        // Here, this method returns the field value        // day-of-week that is an enum DayOfWeek        // from this date-time object (da_ti1)        DayOfWeek dow = da_ti1.getDayOfWeek();        // Display dow        System.out.println("da_ti1.getDayOfWeek(): " + dow);        // Here, this method returns the field value        // day-of-week that is an enum DayOfWeek        // from this date-time object (da_ti2)        dow = da_ti2.getDayOfWeek();        // Display dow        System.out.println("da_ti2.getDayOfWeek(): " + dow);    }}

Output

输出量

LocalDateTime da_ti1 and da_ti2: da_ti1: 2005-10-05T10:10:10da_ti2: 2020-06-05T02:39:20.357805da_ti1.getDayOfWeek(): WEDNESDAYda_ti2.getDayOfWeek(): FRIDAY

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