Characters classes specifies a list of possible characters : Basic Regular Expressions « Regular Expressions « Java

1. Java
2. Regular Expressions
3. Basic Regular Expressions

Characters classes specifies a list of possible characters

   

Character Class Meta-Character            Matches

.                                         Any single character

\d                                        A digit [0-9]

\D                                        A nondigit [^0-9]

\s                                        A whitespace character [ \t\n\x0B\f\r]

\S                                        A nonwhitespace character[^\s]

\w                                        A word character  [a-zA-Z_0-9]

\W                                        A nonword character [^\w] 

   
    
  

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