Java: Unicode in Source Code

File Encoding

• In Java 1.5 (2004), the source file encoding should be UTF-16, by spec.
• In Java 18 (2022) , source code should be UTF-8

When saving file, make sure you save it as UTF-8 encoding. Your editor should have a option to do so. [see Set Text Editor File Encoding]

If you have errors in compiling, try

javac -encoding UTF8 filename

[see Unicode Basics: Character Set, Encoding, UTF-8]