Question

How to use negation ([^abc]) regular expression (REGEX) in Java

Answer 1

package javaapplication1;

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

public class Example {
    public static void main(String[] args) {
        // Any character except b, c, or d
        searchREGEX("[^bcd]at", "bat", "cat", "dat", "pat");
    }
   	
    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;
            }
            if (!found) 
                System.out.println("Not found");
	    }
    }
}


/*
run:
 
Not found
Not found
Not found
Found "pat" from index 0 to 3
 
*/

 

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