In programs, it is often necessary to verify the legality of data such as strings. If there are no other new technologies, we can only use the original methods in strings to make various judgments such as interception. This requires a large amount of code writing and is not required. Conducive to program maintenance. Therefore, a simpler technology is provided to verify data such as code strings. This technology is regular expressions. Regular expression: An expression composed of correct rules, which can verify the validity of other string data.
Regular expressions, other API directories
1. Regular expression
2. Other API
3. Features of JDK5
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