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To verify whether the given input string is a valid email ID, please use the following regular expression to match the given input string to match the email ID-
"^[a-zA-Z0-9+_.-]+@[a-zA-Z0-9.-]+$"
Where,
^ matches the beginning of the sentence.
[a-zA-Z0-9 + _.-] matches a character from the English alphabet (two cases), the number "+", "_", "." before the "@" symbol.
+ indicates one or more repetitions of the preceding character set.
@ matches itself.
[a-zA-Z0-9.-] matches a character from the English alphabet (two cases), the number "." after the "@" symbol.
$ represents the end of the sentence.
import java.util.Scanner; public class ValidatingEmail { public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.println("Enter your Email: "); String phone = sc.next(); String regex = "^[a-zA-Z0-9+_.-]+@[a-zA-Z0-9.-]+$"; //Match the given number with the regular expression boolean result = phone.matches(regex); if(result) { System.out.println("Given email-id is valid"); } else { System.out.println("Given email-id is not valid"); } } }
Enter your Email: [email protected] Given email-id is valid
Enter your Email: [email protected] Given email-id is not valid
import java.util.Scanner; import java.util.regex.Matcher; import java.util.regex.Pattern; public class Test { public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.println("Inserisci il tuo nome:"); String name = sc.nextLine(); System.out.println("Inserisci il tuo email ID:"); String phone = sc.next(); //Espressione regolare accettata per l'email ID valido String regex = "^[a-zA-Z0-9+_.-]+@[a-zA-Z0-9.-]+$"; //Crea un oggetto Pattern Pattern pattern = Pattern.compile(regex); //Crea un oggetto Matcher Matcher matcher = pattern.matcher(phone); //Verifica se il numero fornito è valido if(matcher.matches()) { System.out.println("L'email ID fornito è valida"); } else { System.out.println("L'email ID fornito non è valida"); } } }
Inserisci il tuo nome: vagdevi Inserisci il tuo email ID: [email protected] L'email ID fornito è valida
Inserisci il tuo nome: raja Inserisci il tuo email ID: [email protected] L'email ID fornito non è valida