Email validation using regular expressions is common task which may be required in any application which seek email address as required information in registration step.
There may be more usecase but that’s not point of discussion here. validating email address in java using regular expressions.
Regular expressions are more powerful and flexible. You can search Numbers, punctuation characters, patterns and so on.
At the same time, Regular Expression can be very confusing and tricky.
Using Regular Expressions, it is simple to search for a specific word or string of characters.
Almost every editor on every computer system can do this.
Another common use-case is when we get a large text-file (a dump, or a log file) and we need to extract the list of e-mail address from that file. Until it becomes approved use this expression so far: public const string Match Email Pattern = @"^(([\w-] \.) [\w-] |([a-z A-Z]|[\w-]))@" @"((([0-1]? Characters with following restrictions: Space and "(),:;@ \ Restrictions: · None of the above characters in the local part is allowed outside quotation marks. [64 for Local-part] Valid characters in Local-Part: [a–z, A–Z, 0-9] ! ^ _ ` ~ International characters above U 007F are also permitted.The mapping sample given here exemplifies the power of Regular Expressions by identifying valid E-mail addresses.In the given example, the input data can have E-mail addresses in multiple yet valid formats.