java regular expression tester

Java Study Notes 21 (String supplement: Regular Expression), learning notes string Just like the re module of python, there are some differences between the regular expressions of Java and Python. Here is a brief introduction. For details, refer to other articles on the Inte

index1,char[] Chp,int index2) { if (index2>=chp.length) return index1>= Chs.length; if (index2+1C Language Source code (spents 21ms):BOOL IsMatch (char* S, char* p) { if (S==null | | p==null) return false; if (!*p) return!*s; if (* (p+1) = = ' * ') {while ((*p==*s) | | | (*s *p== '. ')) { if (IsMatch (s,p+2)) return true; s++; } Return IsMatch (s,p+2); } else if ((*p==*s) | | | (*s *p== '. ')) { return IsMatch (s+1,p+

in lowercase **/ Public Static FinalString lower_letter_regexp = "^[a-z]+$"; /*** * matches a string consisting of a number and 26 English letters **/ Public Static FinalString letter_number_regexp = "^[a-za-z0-9]+$"; /*** * matches a string consisting of a number, 26 letters or underscores **/ Public Static FinalString letter_number_underline_regexp = "^//w+$"; /*** Case-sensitive formal expression batching * *@paramSource * Batch-source

When Word transforms HTML, it leaves a lot of formatting, some formatting is not what we need, however, these formats are more than the actual content of the article, seriously affect the loading speed of the page, so you need to find a good solution to the redundant format to remove. There are many regular expressions on the web that remove the JS version of Word redundancy, only the Java version of the

Import java. util. arraylist; Import java. util. RegEx. matcher; Import java. util. RegEx. pattern; Public class test {Public static void main (string [] ARGs ){Getstrings (); // use a regular expression to obtain the specified content in the specified string.System. Out. p

Import java. io. BufferedReader;Import java. io. IOException;Import java. io. InputStreamReader;Import java.net. MalformedURLException;Import java.net. URL;Import java. util. ArrayList;Import java. util. HashMap;Import java. util.

; 为了让规则的结果被重用，可以让规则封装成一个组，用()完成。组的出现都有编号： 从1开始想要使用已有的组可以通过格式：\ + 组序号 Eg:以叠词作为分隔符号，切隔字符串:(.)\1+ Eg: (X(Y(Z)))(M) 组号：1 2 3 4 Replace: Returns the string replaced by the rule1 String:String replaceAll(String regex, String replacement):regex-\n2 String:String replaceFirst(String regex, String replacement):replacement-$n3 Pattern + Matcher: Pattern pattern.compile(String regex) Matcher pattern.matcher(String regex) ------------------------------------- String mat

Regular expressions usually in the use of string processing time is more commonly used, the individual feel that do not need to deliberately to understand, with the words to take out the document to check the good, the following to a link Http://www.php100.com/manual/Javascript/html/jsgrpRegExpSyntax.htm This is a regular expression of the document,

. (COM/CN) is an indefinite number of2. Regular expression: String regx = "\\[email protected]\\w{2,6} (\.[ a-za-z]{2,3}) + ";Analytical:\\w: all letters and numbers; +: The front appears 1 or more times; \\w{2,6}: \\w can only show 2-6\. : ‘.’ this character; [A-za-z]: all the letters; {2,3}: There are only 2-3 letters in front,(\. [A-za-z] {2,3}) +: ' + ' before content appears 1 or more timesAttention:A:

Regular Expressions: ^ ([0-9]+) $, ^: match starts with 0-9, [0-9]: matches 0-9 digits, +: matches at least one number, $: match ends with a number/*** Regular Expression: Verify string number * Two ways: *1.pattern.matcher (Number.trim ()). Find () *2.pattern.matches (Numberregexp,number.trim ()) **/ Public Static BooleanMatchnumber (String number) {Booleanresul

/** * * @author Zen Johnny * @date April 29, 2018 PM 4:51:08 * */package Demo.regex;import Java.util.regex.matcher;import J Ava.util.regex.pattern;public class Regexgetdemo {public static void Getdemo (string string, string regex) {//step1: Encapsulates a rule into an object, pattern pattern = pattern.compile (regex),//STEP2: Associate a regular object with the string to extract, get a match (engine) object Matcher Matcher = Pattern.matcher (string);

Implementation ideas: 1. Use a java.net. url object to bind a webpage address on the network 2. Obtain an httpconnection object through the openconnection () method of the java.net. url object. 3. Use the getinputstream () method of the httpconnection object to obtain the input stream object inputstream of the network file. 4. read each row of data in the stream cyclically, and use the regular expression