Java 中的 LocalDateTime getDayOfWeek()方法，带示例

原文:https://www . geesforgeks . org/local datetime-getdayofweek-method-in-Java-with-examples/

LocalDateTime 类的 getDayOfWeek() 方法用于返回星期几字段，这是一个枚举 DayOfWeek。此方法返回一周中某一天的枚举 DayOfWeek。

语法:

public DayOfWeek getDayOfWeek()

参数:该方法不接受任何参数。

返回:该方法从枚举 DayOfWeek 返回星期几。

下面的程序说明了 LocalDateTime.getDayOfWeek()方法:

程序 1:

// Java program to demonstrate
// LocalDateTime.getDayOfWeek() method

import java.time.*;

public class GFG {
    public static void main(String[] args)
    {

        // create a LocalDateTime Object
        LocalDateTime local
            = LocalDateTime.parse("2018-12-03T12:39:10");

        // get dayofweek for this LocalDateTime
        DayOfWeek dayofweek
            = local.getDayOfWeek();

        // print result
        System.out.println("Day of Week: "
                           + dayofweek);
    }
}

输出:

Day of Week: MONDAY

程序二:

// Java program to demonstrate
// LocalDateTime.getDayOfWeek() method

import java.time.*;

public class GFG {
    public static void main(String[] args)
    {

        // create a LocalDateTime Object
        LocalDateTime local
            = LocalDateTime.parse("2018-12-29T02:39:10");

        // get dayofweek for this LocalDateTime
        DayOfWeek dayofweek = local.getDayOfWeek();

        // print result
        System.out.println("Day of Week: "
                           + dayofweek);
    }
}

输出:

Day of Week: SATURDAY

参考:https://docs . Oracle . com/javase/10/docs/API/Java/time/local datetime . html # getDayOfWeek()

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