public void main(){
String emailRegEx = "^[a-zA-Z0-9_\.-]+@([a-zA-Z0-9-]+\.)+[a-zA-Z0-9]{2,4}$";
String email = "bieg@qef.com";
System.out.println(email.matches(emailRegEx));
}
public void main(){
String emailRegEx = "^[a-zA-Z0-9_\.-]+@([a-zA-Z0-9-]+\.)+[a-zA-Z0-9]{2,4}$";
String email = "bieg@qef.com";
System.out.println(email.matches(emailRegEx));
}