Java 中的 DayOfWeek getDisplayName()方法，带示例
原文:https://www . geesforgeks . org/dayofweek-getdisplayname-method-in-Java-with-examples/
java.time.DayOfWeek 的 getDisplayName() 方法是 java 中的内置函数，它根据指定的 Locale 类参数和 TextStyle 返回一周中某一天的文本表示。TextStyle 定义了三个元素“FULL”、“SHORT”和“窄带”。Locale 类表示世界上的一种特定语言和地区。
方法声明:
public String getDisplayName(TextStyle style, Locale locale)
语法:
String text = dayOfWeekObject.getDisplayName(TextStyle style, Locale locale)
参数:该方法取两个参数:
-
样式–是 TestStyle，可以是“FULL”、“SHORT”和“窄带”三个元素。 地区–代表世界上特定的语言和地区。默认区域设置是美国 dayOfWeekObject – is an instance of DayOfWeek.
返回值:函数返回根据指定的 Locale 类参数和 TextStyle 返回星期几的文本表示。
以下程序说明了上述方法: 程序 1:
```java // Java Program Demonstrate getDisplayName() // method of DayOfWeek
import java.time.*; import java.time.format.TextStyle; import java.util.Locale;
class DayOfWeekExample { public static void main(String[] args) { // Initializing a DayOfWeek instance DayOfWeek dayOfWeek = DayOfWeek.MONDAY;
// Get textual representation of the // day-of-week in FULL style String full_name = dayOfWeek .getDisplayName(TextStyle.FULL, Locale.getDefault());
// Get textual representation of the // day-of-week in SHORT style String short_name = dayOfWeek .getDisplayName(TextStyle.SHORT, Locale.getDefault());
// Get textual representation of the // day-of-week in NARROW style String narrow_name = dayOfWeek .getDisplayName(TextStyle.NARROW, Locale.getDefault());
// Printing the textual names of the day-of-week System.out.println(full_name);
System.out.println(short_name);
System.out.println(narrow_name); } } ```
Output:
```java Monday Mon M
```
程序 2:
```java // Java Program Demonstrate getDisplayName() // method of DayOfWeek
import java.time.*; import java.time.DayOfWeek; import java.time.format.TextStyle; import java.util.Locale;
class DayOfWeekExample { public static void main(String[] args) { // Initializing a DayOfWeek instance DayOfWeek dayOfWeek = DayOfWeek.WEDNESDAY;
// Get textual representation of the // day-of-week in FULL style String full_name = dayOfWeek .getDisplayName(TextStyle.FULL, Locale.getDefault());
// Get textual representation of the // day-of-week in SHORT style String short_name = dayOfWeek .getDisplayName(TextStyle.SHORT, Locale.getDefault());
// Get textual representation of the // day-of-week in NARROW style String narrow_name = dayOfWeek .getDisplayName(TextStyle.NARROW, Locale.getDefault());
// Printing the textual names of the day-of-week System.out.println(full_name);
System.out.println(short_name);
System.out.println(narrow_name); } } ```
Output:
```java Wednesday Wed W
```
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