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Java (not to be confused with JavaScript) is a class-based, object-oriented, strongly typed, reflective language and run-time environment (JRE). Java programs are compiled to bytecode and run in a virtual machine (JVM) enabling a "write once, run anywhere" (WORA) methodology.

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Simple code to check format of user inputted email address

My preference for accepting user input in a blocking loop like this might look more like: public enum Returned { OK, ERROR_EMAIL }; … // Long loop here to get valid user registration info. / …
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