java.time.DayOfWeek的getDisplayName()方法是Java中的一個內置函數，它根據指定的Locale類參數和TextStyle返回day-of-week的文本表示形式。 TextStyle定義了三個元素“ FULL”，“ SHORT”和“ NARROW”。語言環境類別代表世界上特定的語言和地區。

方法聲明：

public String getDisplayName(TextStyle style, Locale locale)

用法:

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

參數：此方法有兩個參數：

style–是TestStyle，可以包含三個元素“ FULL”，“ SHORT”和“ NARROW”。

locale–代表世界上特定的語言和地區。默認語言環境是US

dayOfWeekObject–是DayOfWeek的實例。

返回值：該函數返回根據指定的Locale類參數和TextStyle返回day-of-week的文本表示形式。

以下示例程序旨在說明上述方法：

示例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);

}

}

輸出：

Monday

Mon

M

示例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);

}

}

輸出：

Wednesday

Wed

W