Andres Soolo I think that could only be a problem if you are using some other language that compiles to Java as an intermediate representation. I otherwise can’t think of a way unicode literals in the the source code could cause a problem at runtime apart from the obvious problem of obfuscating pieces of the program from the developers.
John Hardy Developer 
That cannot work, surely?
(I did try and fire up Java to test, but my eyes started to bleed when I had to build all the guff around a main() function just to run it)
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The rules say, Unicode escapes are parsed before lexical scanning: <https://docs.oracle.com/javase/specs/jls/se7/html/jls-3.html>
docs.oracle.com – Chapter 3. Lexical Structure
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I just tried it, it works. It would be useful for driving colleagues crazy.
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Ramin Honary : Just imagine a strategically placed u0022 or u005C in the middle of a string literal.
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Andres Soolo I think that could only be a problem if you are using some other language that compiles to Java as an intermediate representation. I otherwise can’t think of a way unicode literals in the the source code could cause a problem at runtime apart from the obvious problem of obfuscating pieces of the program from the developers.
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C can do similarly crazed things with trigraphs. 🙂
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