| Cases | Regex (Java) |
|---|---|
| Valid Phone format | With Parenthese: ^((\(\d{3}\))|\d{3})[- .]?\d{3}[- .]?\d{4}$Example: (988) 989-8899 With International Prefix: ^(\+\d{1,3}( )?)?((\(\d{3}\))|\d{3})[- .]?\d{3}[- .]?\d{4}$Example: +111 (202) 555-0125 10 digits: ^(\d{3}[- .]?){2}\d{4}$Example: 989 999 6789 |
| Valid Email format | Simplest:^(.+)@(.+)$RFC 5322: ^[a-zA-Z0-9_!#$%&’*+\/=?`{|}~^.-]+@[a-zA-Z0-9.-]+$No leading, trailing, consecutive dots: ^[a-zA-Z0-9_!#$%&’+\/=? |
| Valid Money format | ^(?:(?![,0-9]{14})\d{1,3}(?:,\d{3})*(?:\.\d{1,2})?|(?![.0-9]{14})\d{1,3}(?:\.\d{3})*(?:\,\d{1,2})?)$Example: 123,234,432.43 , 123.234.432,43 |
| Valid ISO Date time format | (\d{4}-\d{2}-\d{2})[A-Z]+(\d{2}:\d{2}:\d{2}).([0-9+-:]+)Example: 2021-10-12T23:59:00+07:00 |
| Valid URL | ^(https?|ftp|file):\/\/[-a-zA-Z0-9+&@#\/%?=~_|!:,.;]*[-a-zA-Z0-9+&@#\/%=~_|]Example: https://www.the-tech-lead.com |
| Strong password | ^(?=.*[0-9])(?=.*[a-z])(?=.*[A-Z])(?=.*[@#$%^&+=])(?=\S+$).{8,}$– A digit must occur at least once – A lower case letter must occur at least once – An upper case letter must occur at least once – A special character must occur at least once – No whitespace allowed in the entire string – At least eight places |
| Valid IP v4 | ^(([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])(\.(?!$)|$)){4}$Example: 192.168.0.1 |
| Valid IP v6 | Standard format:^(?:[0-9a-fA-F]{1,4}:){7}[0-9a-fA-F]{1,4}$Example: 2001:0db8:85a3:0000:0000:8a2e:0370:7334 Hex Compressed format: ^((?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)?)::((?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)?)$Example: 2001:0db8:85a3:0000::8a2e:0370:7334 |
| Valid Domain name | ^(?!-)[A-Za-z0-9-]+([\-\.]{1}[a-z0-9]+)*\.[A-Za-z]{2,6}$Example: the-tech-lead.com |
| Valid Credit Card Number | ^(?:4[0-9]{12}(?:[0-9]{3})?|[25][1-7][0-9]{14}|6(?:011|5[0-9][0-9])[0-9]{12}|3[47][0-9]{13}|3(?:0[0-5]|[68][0-9])[0-9]{11}|(?:2131|1800|35\d{3})\d{11})$for Visa, MasterCard, American Express, Diners Club, Discover, and JCB cards. |
| Camel Case | ((?:[A-Z]+[a-z]\s)[A-Z]+[a-z]*)Example: TX Simply Premier Checking |
Note:
- when use
String regex = "copied regex", don’t forget to add extra"\", so"\d"should become"\\d","\."become"\\.", etc - Replace
^and$as.*to have the “containing” matching. Example to match a string containing texts look like money :Boolean match = someString.match(".*(?:(?![,0-9]{14})\\d{1,3}(?:,\\d{3})*(?:\\.\\d{1,2})?|(?![.0-9]{14})\\d{1,3}(?:\\.\\d{3})*(?:\\,\\d{1,2})?).*")
TheTechLead 