Java DayOfWeek getDisplayName()方法及示例

java.time.DayOfWeek 的 getDisplayName() 方法是Java中的一个内置函数，它根据指定的Locale类参数和TextStyle返回星期的文本表示。TextStyle定义了三个元素’FULL’、’SHORT’和’NARROW’。Locale类代表世界上的特定语言和地区。

方法声明 。

 public String getDisplayName(TextStyle style, Locale locale)

语法

 String text = dayOfWeekObject.getDisplayName(TextStyle style, Locale locale)

参数： 该方法需要两个参数。

style – 是TestStyle，可以是三个元素’FULL’、’SHORT’和’NARROW’。
locale – 代表世界上的特定语言和地区。默认的locale是美国。
dayOfWeekObject – 是DayOfWeek的一个实例。

返回值： 该函数根据指定的Locale类参数和TextStyle，返回星期的文本表示法。

下面的程序说明了上述方法：

程序 1 :

// 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);
    }
}

输出:

Monday
Mon
M

程序2

// 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);
    }
}

输出: