locale()方法是java.util.Formatter的内置方法，该方法返回语言环境。此区域设置由格式化程序构造设置。具有语言环境参数的该对象的format方法不会更改此值。

用法：

public Locale locale()

参数：该函数不接受任何参数。

返回值：如果未应用任何本地化，则该函数返回null，否则返回已初始化给格式化程序的语言环境。

异常注意：如果在调用函数之前关闭了格式化程序，则该函数将引发FormatterClosedException。

下面是上述功能的实现：

示例1:

// Java program to implement

// the above function

import java.util.Formatter;

import java.util.Locale;

public class Main {

public static void main(String[] args)

{

// Get the string Buffer

StringBuffer buffer

= new StringBuffer();

// Object creation

Formatter frmt

= new Formatter(buffer,

Locale.CANADA);

// Format a new string

String name = "My name is Gopal Dave";

frmt.format("What is your name? \n%s !",

name);

// Print the Formatted string

System.out.println(frmt);

// Prints the format that has been set

// Initially to the formatter

System.out.println("Locale: "

+ frmt.locale());

}

}

输出：

What is your name?

My name is Gopal Dave !

Locale: en_CA

示例2:

// Java program to implement

// the above function

import java.util.Formatter;

import java.util.Locale;

public class Main {

public static void main(String[] args)

{

try {

// Get the string Buffer

StringBuffer buffer

= new StringBuffer();

// Object creation

Formatter frmt

= new Formatter(buffer,

Locale.CANADA);

// Format a new string

String name = "My name is Gopal Dave";

frmt.format("What is your name? \n%s !",

name);

// Print the Formatted string

System.out.println(frmt);

// Formatter closed

frmt.close();

// Prints the format that has been set

// Initially to the formatter

System.out.println("Locale: "

+ frmt.locale());

}

catch (Exception e) {

System.out.println("Exception is: "

+ e);

}

}

}

输出：

What is your name?

My name is Gopal Dave !

Exception is: java.util.FormatterClosedException