The regular expression verifies the QQ number and the regular expression number.

The regular expression verifies the QQ number and the regular expression number.

If you don't talk much about it, paste the Code directly. The specific code is as follows:

Package regular expression;/* verification requirements for QQ numbers 5 ~ 15 digits. It cannot start with 0 and can only be numbers */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] {4, 14}"; // a number between the first digit and the second digit, the number range is 4-14. // String regex2 = "[1-9] \ d {4, 14}"; // This sentence can also be boolean flag = qq. matches (regex); if (flag) System. out. println ("correct QQ number"); else System. out. println ("Incorrect QQ number ");}}

The above is the regular expression introduced by the editor to verify the QQ number. I hope it will be helpful to you. If you have any questions, please leave a message and the editor will reply to you in time. Thank you very much for your support for the help House website!