java ubuntu support languages -



i'm writing java app should support multiple languages. text available in different languages. unknown in advance.
in case print system.out or log or socket appears question mark (?) when running on ubuntu server.
running on local windows machine works. in both cases didn't change file.encoding using system defaults (isn't "utf-8" java if not set?)
i assume related encoding need help.

adding jvm argument: -dfile.encoding="utf-8" worked


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