The isSupported() method is a built-in method of the java.nio.charset checks if a given charset is supported or not.
Syntax:
public final boolean isSupported()
Parameters: The function accepts a single mandatory parameter charset Name which specifies the canonical name or the alias name which is to be checked.
Return Value: The function returns a boolean value. It returns true if it is supported, else it returns false.
Errors and Exceptions: The function throws two exceptions as shown below:
- IllegalCharsetNameException: It is thrown if the given charset name is illegal
- IllegalArgumentException : It is thrown if the given charset Name is null
Below is the implementation of the above function:
Program 1:
Java
// Java program to demonstrate// the above functionimport 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); } }} |
Output:
ISO-2022-CN is supported or not? :true
Program 2:
Java
// Java program to demonstrate// the above functionimport 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); } }} |
Output:
ISO is supported or not? :false
Program 3:
Java
// Java program to demonstrate// the above functionimport 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); } }} |
Output:
Exception is java.nio.charset.IllegalCharsetNameException:
