Java Calendar setFirstDayOfWeek()用法及代碼示例

Calendar類中的setFirstDayOfWeek(int day_val)方法用於在此Calendar中使用day_val設置一周的第一天。

用法:

public void set(int day_val)

參數：該方法采用整數類型的一個參數day_val，表示一周中的第一天。

返回值：該方法不返回任何值。

以下示例程序旨在說明Calendar類的setFirstDayOfWeek()方法的用法：
示例1:

// Java code to illustrate 
// setFirstDayOfWeek() method 
  
import java.util.*; 
  
public class Calendar_Demo { 
    public static void main(String args[]) 
    { 
  
        // Creating calendar object 
        Calendar calndr = Calendar.getInstance(); 
  
        // Displaying first day of the week 
        int first_day = calndr.getFirstDayOfWeek(); 
        System.out.println("The Current"
                           + " First day of the week: "
                           + first_day); 
  
        // Changing the first day of week 
        calndr.setFirstDayOfWeek(Calendar.THURSDAY); 
  
        // Displaying the alternate day 
        first_day = calndr.getFirstDayOfWeek(); 
        System.out.println("The new first"
                           + " day of the week: "
                           + first_day); 
    } 
}

輸出：

The Current First day of the week: 1
The new first day of the week: 5

示例2:

// Java code to illustrate 
// setFirstDayOfWeek() method 
  
import java.util.*; 
public class Calendar_Demo { 
    public static void main(String args[]) 
    { 
  
        // Creating calendar object 
        Calendar calndr 
            = new GregorianCalendar(2018, 6, 10); 
  
        // Displaying first day of the week 
        int first_day = calndr.getFirstDayOfWeek(); 
        System.out.println("The"
                           + " First day of the week: "
                           + first_day); 
  
        // Changing the first day of week 
        calndr.setFirstDayOfWeek(Calendar.MONDAY); 
  
        // Displaying the alternate day 
        first_day = calndr.getFirstDayOfWeek(); 
        System.out.println("The new first"
                           + " day of the week: "
                           + first_day); 
    } 
}

輸出：

The First day of the week: 1
The new first day of the week: 2

參考： https://docs.oracle.com/javase/8/docs/api/java/util/Calendar.html#setFirstDayOfWeek-int-

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注：本文由純淨天空篩選整理自Chinmoy Lenka大神的英文原創作品 Calendar setFirstDayOfWeek() Method in Java with Examples。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。