SourceEncoding

ide.<ProgrammingLanguage>.SourceEncoding = ...

Optionally, an encoding that deviates from the operating system for writing and reading source files can be defined.

Entry in an LFET.Project.ini-file:
ide.Java.SourceEncoding = UTF-8
Entry in an LFET.Project.yaml-file:
ide.Java:
  Enabled: true

  Source:
    Encoding: UTF-8

System-side available encodings can be viewed in LF‑ET using: Help > Info > Details > Ap­pli­ca­tion Info > LookAndFeel [nnn available encodings]