CGBTN2108-DAY12 summary review
DAY12 review
1. Regular expression
Function: take the rules we specify to judge whether the data conforms to this rule
Specify rule: String regex = "[0-9]{17}[0-9X]";Compare the data with the rule: input.matches(regex) – > if it matches, the matches method returns true
2. Packaging
There are only two types of data types ...
Posted by lancet2003 on Sat, 18 Sep 2021 05:25:20 -0700