A class representing a Unicode character is available in the Ujorm framework. A stream of such characters can be loaded from an input stream by the expression:

Stream<UnicodeCharacter> chars = UnicodeCharacter.stream(inputStream, UTF_8);

See a unit tests for more examples:

https://github.com/pponec/ujorm/blob/master/project-m2/ujo-tools/src/test/java/org/ujorm/tools/common/UnicodeCharacterTest.java

A link to the original class is:

https://github.com/pponec/ujorm/blob/master/project-m2/ujo-tools/src/main/java/org/ujorm/tools/common/UnicodeCharacter.java