java Java 中()方法的 WeekFields 示例

Java 中()方法的 WeekFields 示例

原文:https://www . geesforgeks . org/weekfields-of-in-Java-method-in-with-examples/

周域类的()方法的帮助我们获取一个周域的实例。

根据传递给它的参数，有两种类型的()方法。

of(DayOfWeek firstDayOfWeek, int minimalDaysInFirstWeek): This method helps us to an instance of WeekFields from the first day-of-week and minimal days.WeekFields instances are singletons; for each unique combination of firstDayOfWeek and minimalDaysInFirstWeek the same instance will be returned.

语法:

```java public static WeekFields of(DayOfWeek firstDayOfWeek, int minimalDaysInFirstWeek)

```

参数:该方法接受两个参数:
- 第一天第一周是一周的第一天。它不应该为空
- 最小天数第一周是第一周的最小天数，从 1 到 7。
返回值:该方法返回周定义，不为空。

异常:如果最小日的值小于 1 或大于 7，该方法抛出 IllegalArgumentException 。

下面的程序说明了 weekfield . of(DayOfWeek first DayOfWeek，int minimalDaysInFirstWeek)方法: 程序 1:

```java // Java program to demonstrate // WeekFields.of(DayOfWeek, int) method

import java.time.DayOfWeek; import java.time.temporal.WeekFields;

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

// create WeekFields         WeekFields weekFields             = WeekFields.of(DayOfWeek.MONDAY, 1);

// print results         System.out.println(weekFields);     } } ```

Output:

```java WeekFields[MONDAY, 1]

```
of(Locale locale): This method help us to get an instance of WeekFields appropriate for a locale. Syntax:

```java public static WeekFields of(Locale locale)

```

参数:该方法接受地区作为参数，该参数是要使用的地区。它不应为空。

返回值:该方法返回周定义，不为空。

下面的程序说明了 WeekFields.of(龙敏，长最大最小值，长最大值)方法: 程序 2:

```java // Java program to demonstrate // of(Locale locale) method

import java.time.temporal.WeekFields; import java.util.Locale;

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

Locale locale = new Locale("EN", "US");

// create WeekFields         WeekFields weekFields = WeekFields.of(locale);

// print results         System.out.println(weekFields);     } } ```

Output:

```java WeekFields[SUNDAY, 1]

```