"The trick is to use Unicode control characters to reorder tokens in source code at the encoding level. These visually reordered tokens can be used to display logic that, while semantically ...

Even though the introduction of Unicode technically solved this problem, you can still encounter situations in which some or all of your Unicode characters will not display properly in Java programs.

Injecting Unicode Bidi override characters into comments and strings, an adversary could “produce syntactically-valid source code in most modern languages for which the display order of ...