default
Returns the default regular expression for validating email addresses, corresponding to the following pattern: ^\S+@\S+\.\S+$
.
Pattern symbols
Here's the explanation associated to each symbol used in this pattern:
^
Beginning. Matches the beginning of the string, or the beginning of a line if the multiline flag (m) is enabled.\S
Not whitespace. Matches any character that is not a whitespace character (spaces, tabs, line breaks).+
Quantifier. Match 1 or more of the preceding token.@
Character. Match a "@" character (char code 64).\.
Escaped character. Matches a "." character (char code 46).$
End. Matches the end of the string, or the end of a line if the multiline flag (m) is enabled.
Calling from Kotlin
Here's an example of calling this function from Kotlin code:
val regex: EmailAddressRegex = EmailAddressRegex.default()
val expected = """^\S+@\S+\.\S+$"""
assertEquals(expected, "$regex")
Calling from Java
The Java method generated from this function is named defaultPattern
, due to the default
keyword present in this programming language.
Here's an example of calling this function from Java code:
final EmailAddressRegex regex = EmailAddressRegex.defaultPattern();
final String pattern = regex.toString();
final String expected = "^\\S+@\\S+\\.\\S+$";
Assertions.assertEquals(expected, pattern);