https://developers.google.com/j2objc/javadoc/jre/reference/java/nio/charset/UnmappableCharacterException
UnmappableCharacterException | J2ObjC | Google for Developers
googledevelopers
https://docs.oracle.com/javase/jp/18/docs/api/java.base/java/nio/charset/UnmappableCharacterException.html
UnmappableCharacterException (Java SE 18 & JDK 18)
declaration: module: java.base, package: java.nio.charset, class: UnmappableCharacterException
java sejdk