Question

How to use \W regular expression (REGEX) (A non-word characte) in Java

Answer 1

import java.util.regex.Matcher;
import java.util.regex.Pattern;
    
public class Example {
     private static void searchREGEX(String regex, String... search) {
        Pattern pattern = Pattern.compile(regex);
        
        for (String input : search) {
            Matcher matcher = pattern.matcher(input);
   
            boolean found = false;
            
            while (matcher.find()) {
                System.out.println(String.format("Found" + " \"%s\" " + "from index %d to %d",
                                            matcher.group(), matcher.start(), matcher.end()));
                found = true;
            }
            
            System.out.println();
            
            if (!found) {
                 System.out.println(String.format("%s: \"%s\" Not found\n", regex, input));
            }
        }
    }  
    public static void main(String[] args) {
        // \W   (A non-word character: [^\w])
        searchREGEX("\\W", " ", "1", "f35 airplane", ".", "a!");
    }
   
}
   
    
    
/*
run:
 
Found " " from index 0 to 1


\W: "1" Not found

Found " " from index 3 to 4

Found "." from index 0 to 1

Found "!" from index 1 to 2
     
*/

 

70+ SQL courses for beginners and professionals