isSupported()方法是java.nio.charset的内置方法,用于检查是否支持给定的字符集。
用法:
public final boolean isRegistered()
参数:该函数接受单个强制参数charsetName,该参数指定要检查的规范名称或别名。
返回值:该函数返回一个布尔值。如果受支持,则返回true,否则返回false。
错误和异常:该函数引发两个异常,如下所示:
- IllegalCharsetNameException:如果给定的字符集名称不合法,则抛出该异常
- IllegalArgumentException:如果给定的charsetName为null,则抛出该异常
下面是上述函数的实现:
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);
}
}
}
输出:
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);
}
}
}
输出:
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);
}
}
}
输出:
Exception is java.nio.charset.IllegalCharsetNameException:
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注:本文由纯净天空筛选整理自gopaldave大神的英文原创作品 Charset isSupported() method in Java with Examples。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。