Java Formatter format（）方法及示例

ゝ一纸荒年。 2023-03-05 15:53 11阅读 0赞

## Formatter类format()方法 **(**Formatter Class format() method**)** ##

**Syntax:**

**句法：**

public Formatter format(Locale lo, String frmt, Object... args);
        public Formatter format(String frmt, Object... args);

*  **format() method** is available in java.util package.
    
    **format()方法**在java.util包中可用。
 *  **format(Locale lo, String frmt, Object… args) method** is used to return this formatter which writes formatted string to this object by the given locale(lo), string format (frmt) and the given Object argument.
    
    **format(Locale lo，String frmt，Object…args)方法**用于返回此格式化程序，该格式化程序通过给定的locale(lo)，字符串格式(frmt)和给定的Object参数将格式化的字符串写入此对象。
 *  **format(String frmt, Object... args) method** is used to return this formatter that writes formatted string to this object by using the given string format (frmt) and Object arguments.
    
    **format(String frmt，Object ... args)方法**用于返回此格式化程序，该格式化程序通过使用给定的字符串格式(frmt)和Object参数将格式化后的字符串写入此对象。
 *  These are the non-static methods, it is accessible with the class object and if we try to access the method with the class name then we will get an error.
    
    这些是非静态方法，可通过类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。
 *  These methods may throw an exception at the time of returning Formatter.
    
    这些方法在返回Formatter时可能会引发异常。
    
     *  **FormatterClosedException**: This exception throws when this formatter close by calling it's close().**FormatterClosedException** ：当此格式化程序通过调用其close()关闭时，将引发此异常。
     *  **IllegalArgumentException**: This exception when any one of the given argument is illegal or invalid format.**IllegalArgumentException** ：当给定参数中的任何一个为非法或无效格式时，此异常。

**Parameter(s):**

**参数：**

*  In the first case, **format(Locale lo, String frmt, Object... args)**,
    
    在第一种情况下， **format(Locale lo，String frmt，Object ... args)** ，
    
     *  Locale lo – represents the locale to implement during formatting.
     *  语言环境lo –表示格式化期间要实现的语言环境。
     *  String frmt – represents the format string.
     *  字符串frmt –表示格式字符串。
     *  Object... args – represents the arguments linked by the format specifies in the format string.
     *  Object ... args –表示由格式字符串中指定的格式链接的参数。
 *  In the first case, **format(String frmt, Object... args)**,
    
    在第一种情况下， **format(String frmt，Object ... args)** ，
    
     *  String frmt – represents the format string.
     *  字符串frmt –表示格式字符串。
     *  Object... args – represents the arguments linked by the format specifies in the format string.
     *  Object ... args –表示由格式字符串中指定的格式链接的参数。

**Return value:**

**返回值：**

The return type of this method is Formatter, it returns this Formatter object.

此方法的返回类型为Formatter ，它返回此Formatter对象。

**Example:**

**例：**

// Java program is to demonstrate the example of
    // format() method of Formatter
    
    import java.util.*;
    
    public class FormatOfFormatter {
        
        public static void main(String[] args) {
        
            // Instantiates a StringBuffer and Formmatter object
            StringBuffer sb = new StringBuffer();
            Formatter formatt = new Formatter(sb, Locale.UK);
    
            // By using format(locale,format,Object...) method is
            // to format a string with the given locale
            formatt.format(Locale.UK, "Hi %s !", "IncludeHelp");
    
            // Display Formatted String
            System.out.println(formatt);
    
            // By using format(format,Object...) method is
            // to format a string with the default locale
            formatt.format("Hi %s !", "IncludeHelp");
    
            // Display Formatted String
            System.out.println(formatt);
        }
    }

**Output**

**输出量**

Hi IncludeHelp !
    Hi IncludeHelp !Hi IncludeHelp !

> 翻译自: [https://www.includehelp.com/java/formatter-format-method-with-example.aspx][https_www.includehelp.com_java_formatter-format-method-with-example.aspx]

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