Java Charset availableCharsets()用法及代碼示例

availableCharsets()方法是java.nio.charset的內置方法，構造從規範字符集名稱到字符集對象的排序映射。這樣返回的映射將對每個字符集都有一個條目。如果有多個同名條目，則僅存儲其中一個完全依賴於Java虛擬機。在程序的每次執行中，如果新的字符集提供程序可動態提供給當前Java虛擬機，則輸出可能會有所不同。

用法：

public static SortedMap availableCharsets()

參數：該函數不接受任何參數。

返回值：該函數返回一個不變的映射大小寫敏感。從規範字符集命名為字符集對象。

下麵是上述函數的實現：

示例1:

// Java program to demonstrate 
// the above function 
  
import java.nio.charset.Charset; 
import java.util.Iterator; 
import java.util.Map; 
  
public class GFG { 
  
    public static void main(String[] args) 
    { 
        // Creates a map of charsets 
        Map<String, Charset> charsets 
            = Charset.availableCharsets(); 
  
        // Iterator to store the type 
        Iterator<Charset> iterator 
            = charsets.values().iterator(); 
  
        // Iterate till we get all the charsets 
        while (iterator.hasNext()) { 
  
            // Get the next 
            Charset all = (Charset)iterator.next(); 
  
            // Displays the name 
            System.out.print(all.displayName() + " "); 
        } 
    } 
}

輸出：

Big5 Big5-HKSCS CESU-8 EUC-JP EUC-KR GB18030 GB2312 GBK IBM-Thai IBM00858 IBM01140 IBM01141 IBM01142 IBM01143 IBM01144 IBM01145 IBM01146 IBM01147 IBM01148 IBM01149 IBM037 IBM1026 IBM1047 IBM273 IBM277 IBM278 IBM280 IBM284 IBM285 IBM290 IBM297 IBM420 IBM424 IBM437 IBM500 IBM775 IBM850 IBM852 IBM855 IBM857 IBM860 IBM861 IBM862 IBM863 IBM864 IBM865 IBM866 IBM868 IBM869 IBM870 IBM871 IBM918 ISO-2022-CN ISO-2022-JP ISO-2022-JP-2 ISO-2022-KR ISO-8859-1 ISO-8859-13 ISO-8859-15 ISO-8859-2 ISO-8859-3 ISO-8859-4 ISO-8859-5 ISO-8859-6 ISO-8859-7 ISO-8859-8 ISO-8859-9 JIS_X0201 JIS_X0212-1990 KOI8-R KOI8-U Shift_JIS TIS-620 US-ASCII UTF-16 UTF-16BE UTF-16LE UTF-32 UTF-32BE UTF-32LE UTF-8 windows-1250 windows-1251 windows-1252 windows-1253 windows-1254 windows-1255 windows-1256 windows-1257 windows-1258 windows-31j x-Big5-HKSCS-2001 x-Big5-Solaris x-COMPOUND_TEXT x-euc-jp-linux x-EUC-TW x-eucJP-Open x-IBM1006 x-IBM1025 x-IBM1046 x-IBM1097 x-IBM1098 x-IBM1112 x-IBM1122 x-IBM1123 x-IBM1124 x-IBM1166 x-IBM1364 x-IBM1381 x-IBM1383 x-IBM300 x-IBM33722 x-IBM737 x-IBM833 x-IBM834 x-IBM856 x-IBM874 x-IBM875 x-IBM921 x-IBM922 x-IBM930 x-IBM933 x-IBM935 x-IBM937 x-IBM939 x-IBM942 x-IBM942C x-IBM943 x-IBM943C x-IBM948 x-IBM949 x-IBM949C x-IBM950 x-IBM964 x-IBM970 x-ISCII91 x-ISO-2022-CN-CNS x-ISO-2022-CN-GB x-iso-8859-11 x-JIS0208 x-JISAutoDetect x-Johab x-MacArabic x-MacCentralEurope x-MacCroatian x-MacCyrillic x-MacDingbat x-MacGreek x-MacHebrew x-MacIceland x-MacRoman x-MacRomania x-MacSymbol x-MacThai x-MacTurkish x-MacUkraine x-MS932_0213 x-MS950-HKSCS x-MS950-HKSCS-XP x-mswin-936 x-PCK x-SJIS_0213 x-UTF-16LE-BOM X-UTF-32BE-BOM X-UTF-32LE-BOM x-windows-50220 x-windows-50221 x-windows-874 x-windows-949 x-windows-950 x-windows-iso2022jp

參考： https://docs.oracle.com/javase/9/docs/api/java/nio/charset/Charset.html#availableCharsets–

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注：本文由純淨天空篩選整理自gopaldave大神的英文原創作品 Charset availableCharsets() method in Java with Examples。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。