Regular Expression for email validation using Apex in Salesforce

Sample Regular Expression for email validation using Apex is given below

Sample Code:
                

                if(Pattern.matches('[a-zA-Z0-9._-]+@[a-zA-Z]+.[a-zA-Z]{2,4}', email))
                {
                    //success
                }
                else
                {
                    //error       
                }

Cheers!!!

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