Xóa bài viết
Bạn có chắc chắn muốn xóa bài viết này không ?
Xóa bình luận
Bạn có chắc chắn muốn xóa bình luận này không ?
Java Regular Expression Overview – Syntax
https://grokonez.com/java/java-regular-expression-overview-syntax
Java Regular Expression Overview – Syntax
Regular expression (regex) defines patterns to recognise strings. Those patterns can be anything: a character, a specific string, a group of special characters or a combination of them. We can use Regular expression for searching, extracting, and modifying text.
This tutorial shows you an overview of Regular Expression Syntax.
I. Syntax
1. Characters
To define content of a regex pattern, we use many kinds of character classes:
| character | match | abbreviation of |
|---|---|---|
| . | any single character except newline (we can use m option to match the newline) |
|
| \d | a digit | [0-9] |
| \D | a non-digit | [^0-9] |
| \s | a whitespace character | [ \t\n\x0B\f\r] |
| \S | a non-whitespace character | [^\s] |
| \w | a word character | [a-zA-Z_0-9] |
| \W | a non-word character | [^\w] |
When using in real Java code, except '.', we should double the 'escape' (\) :
https://grokonez.com/java/java-regular-expression-overview-syntax
Java Regular Expression Overview – Syntax
Bình luận
{{ comment.user.name }}
Bỏ hay
Hay
Cùng một tác giả
1
0
Tutorial Link: (Link) (Ảnh) Django is a Pythonbased free and opensource web framework that follows the modeltemplateview architectural pattern. A...
1
0
https://loizenai.com/angular11nodejspostgresqlcrudexample/ Angular 11 Node.js PostgreSQL Crud Example (Ảnh) Tutorial: “Angular 11 Node.js Postg...
1
0
Angular Spring Boot jwt Authentication Example Github https://loizenai.com/angularspringbootjwt/ (Ảnh) Tutorial: ” Angular Spring Boot jwt Authe...