當前位置: 首頁>>代碼示例 >>用法及示例精選 >>正文

Java Charset canEncode()用法及代碼示例


canEncode()方法是java.nio.charset的內置方法，用於檢查特定字符集是否支持編碼。除少數字符集外，幾乎每個字符集都可以編碼。

用法：

public boolean canEncode()

參數：該函數不接受任何參數。


返回值：該函數返回一個布爾值。如果支持編碼，則返回true；否則返回false。

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(); 
  
            // Print all the charset which cannot encode 
            if (all.canEncode() == false) 
                System.out.println(all.displayName()); 
        } 
    } 
}
輸出： 
ISO-2022-CN
x-JISAutoDetect

示例2:

// 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(); 
  
            // Print all the charset which can encode 
            if (all.canEncode() == true) 
                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-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-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#canEncode–



相關用法


注：本文由純淨天空篩選整理自gopaldave大神的英文原創作品 Charset canEncode() 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。