Use Java regular expressions to check valid email addresses

To verify whether the given input string is a valid email ID, 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 + _.-[a] matches a character from the English alphabet (two cases), a number ", +", "_", ".", the "-" before the @ symbol.-"

• +Represents repeating the above character set one or more times.

• @ matches itself.

• [a-zA-Z0-9.-[a] matches a character from the English alphabet (two cases), a number ".", and the "-" after the @ symbol.

• $ represents the end of the sentence.

Example

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);
　　　　　　}
　　　}
}

Output1

Enter your Email:
[email protected]
Given email-id is valid

Output2

Enter your Email:
[email protected]
Given email-id is not valid

Example2

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("Enter your name:");
　　　　　　String name = sc.nextLine();
　　　　　　System.out.println("Enter your email id:");
　　　　　　String phone = sc.next();
　　　　　　//Regular expression to accept valid email ID
　　　　　　String regex = "^[a-zA-Z0-9+_.-]+@[a-zA-Z0-9.-]+$";
　　　　　　//Create a pattern object
　　　　　　Pattern pattern = Pattern.compile(regex);
　　　　　　//Create a Matcher object
　　　　　　Matcher matcher = pattern.matcher(phone);
　　　　　　//Verify if the given number is valid
　　　　　　if(matcher.matches()) {
　　　　　　　　　System.out.println("Given email id is valid");
　　　　　　} else {
　　　　　　　　　System.out.println("Given email id is not valid");
　　　　　　}
　　　}
}

Output1

Enter your name:
vagdevi
Enter your email id:
[email protected]
Given email id is valid

Output2

Enter your name:
raja
Enter your email id:
[email protected]
Given email id is not valid