Email Validation

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import java.util.regex.Pattern; class Main { public static void main(String[] args) { String s1 = "umam@-.co"; String s2 = "umam@email"; String s3 = "umam@email.co"; String s4 = "umam@email.co."; String s5 = "umam@email.co.id"; String s6 = "umam@email.co.id-"; System.out.println(isValidEmailId(s1)); System.out.println(isValidEmailId(s2)); System.out.println(isValidEmailId(s3)); System.out.println(isValidEmailId(s4)); System.out.println(isValidEmailId(s5)); System.out.println(isValidEmailId(s6)); } private static boolean isValidEmailId(String email) { System.out.print(email + " => "); return Pattern.compile("(?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*|\"(?:[\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x21\\x23-\\x5b\\x5d-\\x7f]|\\\\[\\x01-\\x09\\x0b\\x0c\\x0e-\\x7f])*\")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[a-z0-9-]*[a-z0-9]:(?:[\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x21-\\x5a\\x53-\\x7f]|\\\\[\\x01-\\x09\\x0b\\x0c\\x0e-\\x7f])+)\\])").matcher(email).matches(); } }
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