A detailed explanation of Java Regular expression syntax _java

Shared Java Regular expression syntax and examples below

1, matching verification-Verify that the email is correct

public static void Main (string[] args) {
 //string
 str = "service@xsoftlab.net" to be validated;
 Mailbox validation Rule
 String regEx = [a-za-z_]{1,}[0-9]{0,}@ ([a-za-z0-9]-*) {1,}\\.) {1,3} [a-za-z\\-] {1,} ";
 Compile regular expression pattern
 = Pattern.compile (regEx);
 Ignores case writing/pattern
 Pat = pattern.compile (regEx, pattern.case_insensitive);
 Matcher Matcher = Pattern.matcher (str);
 Whether the string matches the regular expression
 Boolean rs = Matcher.matches ();
 System.out.println (RS);

2. Query character or string in string

public static void Main (string[] args) {
 //string
 str = "baike.xsoftlab.net" to be validated;
 Regular expression rule
 String regEx = "baike.*";
 Compile regular expression pattern
 = Pattern.compile (regEx);
 Ignores case writing/pattern
 Pat = pattern.compile (regEx, pattern.case_insensitive);
 Matcher Matcher = Pattern.matcher (str);
 Find out if there is a character/string in the string that matches the regular expression
 Boolean rs = Matcher.find ();
 System.out.println (RS);

3, regular expression of the common

4, Regular expression syntax

About Java Regular expression syntax and examples for everyone to introduce this, I hope to help you learn.