Shulou(Shulou.com)06/02 Report--

This article mainly introduces the regular expression of how to check the qq number, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor take you to understand it.

The specific code is as follows:

Package regular expression; / * Verification of QQ numbers requires 515 digits, which cannot start with 0, but can only be digits * / import java.util.regex.Matcher; import java.util.regex.Pattern; public class Test {public static void main (String [] args) {/ / TODO Auto-generated method stub String qq = "23412312"; String regex = "[1-9] [0-9] {4jue 14}" / / the number between the first digit 1-9, the number between the second digit 0-9, the number range 4-14 / String regex2 = "[1-9]\\ d {4pm 14}"; / / this sentence can also be boolean flag = qq.matches (regex); if (flag) System.out.println ("QQ number is correct"); else System.out.println ("QQ number error") }} Thank you for reading this article carefully. I hope the article "how regular expressions can verify qq numbers" shared by the editor will be helpful to you. At the same time, I also hope you will support us and pay attention to the industry information channel. More related knowledge is waiting for you to learn!

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