Introduction to Java regular expressions (basic advanced)

A regular expression is a text pattern that includes ordinary characters (for example, letters between a and z) and special characters (called metacharacters). The pattern describes one or more strings to match when searching for text

Let's start with two basic knowledge. For friends who haven't known regular expressions before, you can read the following two articles first

1. Regular expression 30 minute tutorial

2. A detailed explanation of the basic syntax of regular expressions

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