Verifying that the mailbox format is correct

<span style= "FONT-SIZE:14PX;" > Verify that the mailbox format is correct </span>

<span style= "FONT-SIZE:14PX;" >public class StringDemo1 {public  static void Main (string[] args) {/* * mailbox Regular expression *                                     * [A-za-z0-9_][email Protec ted][a-za-z0-9_]+ (\.[ a-za-z]+) +/*  * * A method is provided in the string class to verify that the current string is formatted with a given  * regular expression * to  satisfy the requirements  * Boolean matches (string regex) c7/>*/    String Email   = "[email protected]";    String regex   = "[A-za-z0-9_][email protected][a-za-z0-9_]+ (\\.[ a-za-z]+) + ";   Boolean cwj1=email.matches (regex);  if (cwj1) {  System.out.println ("is the mailbox! ");} else {System.out.println ("not a mailbox! ");}  }} </span>

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Verifying that the mailbox format is correct