Java 中 Calendar getFirstDayOfWeek()方法示例

原文:https://www . geesforgeks . org/calendar-getfirst dayofweek-method-in-Java-with-examples/

Calendar 类中的 getFirstDayOfWeek() 方法用于返回本日历一周的第一天。 语法:

public int getFirstDayOfWeek()

参数:该方法不取任何参数。 返回值:该方法返回一周的第一天。 以下程序说明了日历类 getFirstDayOfWeek()方法的工作: 例 1:

Java 语言(一种计算机语言，尤用于创建网站)

// Java code to illustrate
// getFirstDayOfWeek() method

import java.util.*;

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

        // Creating calendar object
        Calendar calndr = Calendar.getInstance();

        // Displaying the first
        // day of the week
        System.out.println("The First day"
                           + " is: " + calndr.getFirstDayOfWeek());

        int the_day = calndr.getFirstDayOfWeek();
        switch (the_day) {
        case 1:
            System.out.println("Sunday");
            break;
        case 2:
            System.out.println("Monday");
            break;
        case 3:
            System.out.println("Tuesday");
            break;
        case 4:
            System.out.println("Wednesday");
            break;
        case 5:
            System.out.println("Thursday");
            break;
        case 6:
            System.out.println("Friday");
            break;
        case 7:
            System.out.println("Saturday");
            break;
        }
    }
}

Output: 

The First day is: 1
Sunday

参考:T2【https://docs . Oracle . com/javase/7/docs/API/Java/util/calendar . html # getfirst dayofweek()T4】

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