java - What does UnmappableCharacterException mean? -

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reads:

There are two common types of decoding errors if the input byte sequence this charset If the input byte sequence is legal but can not be mapped to a valid Unicode character, then unmatched character is considered if input is not valid for malformed has gone.

I understand the concept of wrong forms, but what does an unmappable character mean? I thought that Unicode contains all possible characters, then why a legal byte sequence can not be copied to the Unicode character?

Although Unicode can represent a great number of characters for a large number of languages, it definitely In other words, characters are set with characters, for which there is no mapping in Unicode.


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