• 语言基础
• 正则表达式

正则表达式

• 匹配
  • Matching a String Against a Pattern
  • Using Pattern and Matcher Classes
  • Matching a Word Boundary using \b to get \b
  • String match with regular expression
  • Match string with regular expression
  • Find match by using regular expression
  • Input and validate data from user using Regular Expression
  • Simple implementation of the ubiquitous grep command.
  • Match a word using regex
  • Match word start in regular expression
  • Regular Expression Search Program Template
  • Determining If a String Matches a Pattern Exactly
  • Counts how many times the regexp appears in the larger String.
  • Check whether the input string matches the regex
  • Find a word and get offset in text using regex
  • Match hyper link using Regex
• 组
  • Using Groups in Regular Expressions
  • Back Referencing a Group in a Replacement Text
  • Using Named Groups in Regular Expressions
  • Count All Words using regex
• 取代
  • Find-and-Replace Using Regular Expressions and appendReplacement() and appendTail() Methods
  • String methods replaceFirst, replaceAll and split.
  • Regular expression replacement
  • Regular expression append/replace
  • Replace after matching in regular expression
  • Replace all after match for a word in regular expression
  • Replace all after match for wildcard in regular expression
  • Using the Captured Text of a Group within a Replacement Pattern
  • Replace string using regex
• 模式
  • Classes Pattern and Matcher.
  • Extracting matched expressions, Email Address Finder
  • Backslashes in regular expressions
  • Java regular expression syntax quick reference
  • Regular expression Pattern class options
  • Test Harness for Regex
  • Catch PatternSyntaxException and get information from it
  • Using a Non-Capturing Group in a Regular Expression
  • Escaping Special Characters in a Pattern
  • Adding Comments to a Regular Expression
  • Using the Captured Text of a Group within a Pattern
  • Setting Case Sensitivity in a Regular Expression
  • Greedy and Nongreedy Matching in a Regular Expression
  • Compiling a Pattern with Multiple Flags
  • Capturing Text in a Group in a Regular Expression
  • Use split method to split a string based on delimiters that match a regular expression
  • Let a user enter the area code for a phone number with or without parentheses.
  • | symbol defines an 'or' operation
  • Reference group in regular expression
  • Create regular expression for U.S. phone numbers with an optional area code
  • Using parentheses to group characters
  • Using escapes In regular expressions with a backslash
  • ? quantifier create an optional element that may or may not be present in the string
  • Duplicating elements rather than using a quantifier \d\d is \d{2}
  • Matching multiple characters any times with Quantifiers
  • What does \d\W[a-z] mean in regular expression
  • Using negation in Regular expressions
  • Use ranges to build a class that accepts only characters that appear in real words
  • Create more than one range in a class
  • Create ranges for pattern with [a-z]
  • Create classes for the first and last characters so they too can be upper- or lowercase:
  • Let the pattern include uppercase letters as well as lowercase letters
  • Using custom character classes
  • \w matches word character (a-z, A-Z, 0-9, or an underscore) and \W matches non word character
  • Limit white space characters to actual spaces, just use a space in the regex.
  • \S matches any character that isn't a white space character.
  • \s class matches white space characters including spaces, tabs, newlines, returns, and backspaces.
  • \D class matches any character that is not a digit.
  • \d class represents a digit and use it to validate a U. S. Social Security number, XXX-XX-XXXX
  • Using predefined character classes
  • Use regex patterns to match a string literal exactly
  • Removing accents and diacritics from given text .
  • Compile a pattern that can will match a string if the string contains any of the given terms.
  • Compile a pattern that can will match a string if the string starts with any of the given terms.
  • Compile a pattern that can will match a string if the string equals any of the given terms.
  • Regular Expression with Multiple Excludes
• 分割
  • Splitting strings with Pattern
  • Split String by regex
  • Split String by digit in regular expression
  • Use \s+ to breaking a string into separate words
• 词
  • Extract All Unique Words using regex
  • Most frequent Word by regex
  • Match single word by regex
  • returns true if the string contains exactly "word" via regex
  • Starts And End With Capital using regex
• 电子邮件
  • find the unique e-mail addresses vis regex
  • Get string with @ in between using regex for email
  • Check email address with regex for gmail