Limit white space characters to actual spaces, just use a space in the regex. - Java Regular Expressions

Description

Limit white space characters to actual spaces, just use a space in the regex.

Demo Code

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {
  public static void main(String[] args) {
    Pattern pattern = Pattern.compile("... ...");
    Matcher matcher = pattern.matcher("asd asd");
    if (matcher.matches())
      System.out.println("Match.");
    else//w  ww . ja  v a  2 s  . c o  m
      System.out.println("Does not match.");
  }

}

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Related Tutorials

• 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
• \S matches any character that isn't a white space character.
• \s class matches white space characters including spaces, tabs, newlines, returns, and backspaces.