Basic java lexer

Lexer.java

// http://www.giocc.com/writing-a-lexer-in-java-1-7-using-regex-named-capturing-groups.html
// javac Lexer.java && java Lexer

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

public class Lexer {
  private static enum Token {
    NUMBER("-?[0-9]+"), OPERATOR("[*|/|+|-]"), SKIP("[ \t\f\r\n]+");

    private final String pattern;

    private Token(String pattern) {
      this.pattern = pattern;
    }
  }

  private static class Word {
    private Token token;
    private String lexeme;

    private Word(Token token, String lexeme) {
      this.token = token;
      this.lexeme = lexeme;
    }

    @Override
    public String toString() {
      return String.format("%-10s => [%s]", token.name(), lexeme);
    }
  }

  private static ArrayList<Word> lex(String input) {
    // The tokens to return
    ArrayList<Word> words = new ArrayList<Word>();

    // Lexer logic begins here
    StringBuffer tokenPatternsBuffer = new StringBuffer();
    for (Token token : Token.values())
      tokenPatternsBuffer.append(String.format("|(?<%s>%s)", token.name(), token.pattern));
    Pattern tokenPatterns = Pattern.compile(new String(tokenPatternsBuffer.substring(1)));

    // Begin matching tokens
    Matcher matcher = tokenPatterns.matcher(input);
    while (matcher.find()) {
      for (Token token : Token.values())
        if (matcher.group(token.name()) != null) {
          words.add(new Word(token, matcher.group(token.name())));
          continue;
        }
    }
    return words;
  }

  public static void main(String[] args) {
    String input = "11 + 22 - 33";

    ArrayList<Word> words = lex(input);
    for (Word word : words)
      System.out.println(word);
  }
}

I have used this code in a project where I made a programming language because it is done well. May I have your permission to use it in my project? If not then I will take my repo down. I just want to make sure I have your permission to use your code in my project. Have a good day.

Nevermind, I deleted my project.