isSupported()方法是java.nio.charset的內置方法,用於檢查是否支持給定的字符集。
用法:
public final boolean isRegistered()
參數:該函數接受單個強製參數charsetName,該參數指定要檢查的規範名稱或別名。
返回值:該函數返回一個布爾值。如果受支持,則返回true,否則返回false。
錯誤和異常:該函數引發兩個異常,如下所示:
- IllegalCharsetNameException:如果給定的字符集名稱不合法,則拋出該異常
- IllegalArgumentException:如果給定的charsetName為null,則拋出該異常
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;
public class GFG {
public static void main(String[] args)
{
try {
System.out.println("ISO-2022-CN"
+ " is supported or not? :"
+ Charset.isSupported("ISO-2022-CN"));
}
catch (Exception e) {
System.out.println("Exception: "
+ e);
}
}
}
輸出:
ISO-2022-CN is supported or not? :true
示例2:
// Java program to demonstrate
// the above function
import java.nio.charset.Charset;
public class GFG {
public static void main(String[] args)
{
try {
System.out.println("ISO is "
+ "supported or not? :"
+ Charset.isSupported("ISO"));
}
catch (Exception e) {
System.out.println("Exception: " + e);
}
}
}
輸出:
ISO is supported or not? :false
示例3:
// Java program to demonstrate
// the above function
import java.nio.charset.Charset;
public class GFG {
public static void main(String[] args)
{
try {
System.out.println("NULL is "
+ "supported or not? :"
+ Charset.isSupported(""));
}
catch (Exception e) {
System.out.println("Exception: "
+ e);
}
}
}
輸出:
Exception is java.nio.charset.IllegalCharsetNameException:
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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 isSupported() 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。