Signals that input to the CharsetDecoder.decode( ) or CharsetEncoder.encode( ) method contained a character or byte sequence that is not mappable in the specified charset.

Figure 13-52. java.nio.charset.UnmappableCharacterException

public class UnmappableCharacterException extends CharacterCodingException {
// Public Constructors
     public UnmappableCharacterException(int inputLength);  
// Public Instance Methods
     public int getInputLength( );  
// Public Methods Overriding Throwable
     public String getMessage( );  
}