Java 中 DayOfWeek valueOf()方法,示例
原文:https://www . geesforgeks . org/dayofweek-value of-in-method-in-Java-with-examples/
java . time . DayOfWeek的 valueOf() 方法是 Java 中的一个内置函数,它接受一个字符串并返回与该字符串对应的 day fweek 的一个实例。该字符串必须与用于在此类型中声明星期几常量的标识符完全匹配。不允许出现多余的空白字符。
方法声明:
public static DayOfWeek valueOf(String name)
语法:
DayOfWeek dayOfWeekObject = DayOfWeek.valueOf(String name)
参数:该方法以名称为参数,其中:
-
名称–是一周中某一天的名称。 dayOfWeekObject* – is an instance of DayOfWeek.
返回值:该函数返回一个对应于名称字符串的 DayOfWeek 实例
以下程序说明了上述方法: 程序 1:
```java // Java Program Demonstrate valueOf() // method of DayOfWeek
import java.time.*;
class DayOfWeekExample { public static void main(String[] args) { // Initializing a DayOfWeek instance DayOfWeek dayOfWeek = DayOfWeek.valueOf("MONDAY");
// Printing the day-of-week System.out.println(dayOfWeek.name()); } } ```
Output:
```java MONDAY
```
程序 2:
```java // Java Program Demonstrate valueOf() // method of DayOfWeek
import java.time.*;
class DayOfWeekExample { public static void main(String[] args) { // Initializing a DayOfWeek instance DayOfWeek dayOfWeek = DayOfWeek.valueOf("SATURDAY");
// Printing the day-of-week System.out.println(dayOfWeek.name()); } } ```
Output:
```java SATURDAY
```
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