Java 中的 DayOfWeek get()方法，示例
原文:https://www . geesforgeks . org/dayofweek-get-method-in-Java-with-examples/
java.time.DayOfWeek 的 get() 方法是 java 中的一个内置函数，它以一个临时字段为参数，从这个星期几获取指定字段的值作为 int。时间字段是一个日期时间字段，例如一年中的月份或一分钟中的小时。日期和时间用这样的字段表示。如果字段是星期几，则返回星期几的值，从 1 到 7。所有其他时间域实例都将抛出一个 unsupportedtemporaltypexception。int 值遵循 ISO-8601 标准，从 1(星期一)到 7(星期日)。
方法声明:
public int get(TemporalField field);
语法:
int val = DayOfWeekObject.get(TemporalField field);
参数:该方法以字段为参数，其中:
-
场–是一个类似于编年史场的时间场。星期几。 DayOfWeekObject* – represents the DayOfWeek object.
参数:该方法不接受任何参数。
返回值:函数返回一周中某一天的 int 值，例如，1 代表星期一，2 代表星期二，以此类推。
以下程序说明了上述方法: 程序 1:
```java // Java Program Demonstrate get() // method of DayOfWeek
import java.time.*; import java.time.DayOfWeek; import java.time.temporal.ChronoField;
class DayOfWeekExample { public static void main(String[] args) { // Set a local date whose day is found LocalDate localDate = LocalDate.of(1947, Month.AUGUST, 15);
// Find the day from the local date DayOfWeek dayOfWeek = DayOfWeek.from(localDate);
// Printing the day of the week // and its Int value System.out.println("Day of the Week on " + localDate + " - " + dayOfWeek.name());
int val = dayOfWeek.get(ChronoField.DAY_OF_WEEK);
System.out.println("Int Value of " + dayOfWeek.name() + " - " + val); } } ```
Output:
```java Day of the Week on 1947-08-15 - FRIDAY Int Value of FRIDAY - 5
```
程序 2:
```java // Java Program Demonstrate get() // method of DayOfWeek import java.time.*; import java.time.DayOfWeek; import java.time.temporal.ChronoField;
class DayOfWeekExample { public static void main(String[] args) { // Set a local date whose day is found LocalDate localDate = LocalDate.of(2015, Month.JULY, 13);
// Find the day from the local date DayOfWeek dayOfWeek = DayOfWeek.from(localDate);
// Printing the day of the week // and its Int value System.out.println("Day of the Week on " + localDate + " - " + dayOfWeek.name());
int val = dayOfWeek.get(ChronoField.DAY_OF_WEEK);
System.out.println("Int Value of " + dayOfWeek.name() + " - " + val); } } ```
Output:
```java Day of the Week on 2015-07-13 - MONDAY Int Value of MONDAY - 1
```
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