CharsetEncoder unmappableCharacterAction() method in Java with Examples

Namachila November 17, 2025

0 1 1 minute read

The unmappableCharacterAction() method is a built-in method of the java.nio.charset.CharsetEncoder returns this encoder’s current action for unmappable-character errors. The CodingErrorAction are of three types IGNORE, REPLACE and REPORT.

Syntax:

public CodingErrorAction unmappableCharacterAction()

Parameters: The function does not accepts any parameter.

Return Value: The function returns the current unmappable-character action, which is never null.

Below is the implementation of the above function:

Program 1:

// Java program to implement
// the above function
import java.nio.CharBuffer;
import java.nio.charset.Charset;
import java.nio.charset.CharsetEncoder;
  
public class Main {
    public static void main(String[] args) throws Exception
    {
        // Gets the encoder
        CharsetEncoder encoder = Charset.forName("UTF16").newEncoder();
  
        // Prints CodingErrorAction
        System.out.println(encoder.unmappableCharacterAction());
    }
}

Output:

REPORT

Program 2:

// Java program to implement
// the above function
import java.nio.CharBuffer;
import java.nio.charset.Charset;
import java.nio.charset.CharsetEncoder;
  
public class Main {
    public static void main(String[] args) throws Exception
    {
        // Gets the encoder
        CharsetEncoder encoder = Charset.forName("US-ASCII").newEncoder();
  
        // Prints CodingErrorAction
        System.out.println(encoder.unmappableCharacterAction());
    }
}