}

    @AfterTemplate
    CharMatcher after() {
      return CharMatcher.digit();
    }
  }

  class JavaDigit {
    @BeforeTemplate
    CharMatcher before() {
      return CharMatcher.JAVA_DIGIT;
    }

    @AfterTemplate
    CharMatcher after() {
      return CharMatcher.javaDigit();
    }
  }

  class JavaLetterOrDigit {
    @BeforeTemplate
    CharMatcher before() {

  }

  /** Implementation of {@link #javaDigit()}. */
  private static final class JavaDigit extends CharMatcher {

    static final CharMatcher INSTANCE = new JavaDigit();

    @Override
    public boolean matches(char c) {
      return Character.isDigit(c);
    }

    @Override
    public String toString() {
      return "CharMatcher.javaDigit()";
    }
  }

    doTestNoMatches(forPredicate(Predicates.equalTo('c')), "abe");
    doTestNoMatches(inRange('A', 'Z').and(inRange('F', 'K').negate()), "F1a");
    doTestNoMatches(CharMatcher.digit(), "\tAz()");
    doTestNoMatches(CharMatcher.javaDigit(), "\tAz()");
    doTestNoMatches(CharMatcher.digit().and(CharMatcher.ascii()), "\tAz()");
    doTestNoMatches(CharMatcher.singleWidth(), "\u05bf\u3000");
  }

    doTestNoMatches(forPredicate(Predicates.equalTo('c')), "abe");
    doTestNoMatches(inRange('A', 'Z').and(inRange('F', 'K').negate()), "F1a");
    doTestNoMatches(CharMatcher.digit(), "\tAz()");
    doTestNoMatches(CharMatcher.javaDigit(), "\tAz()");
    doTestNoMatches(CharMatcher.digit().and(CharMatcher.ascii()), "\tAz()");
    doTestNoMatches(CharMatcher.singleWidth(), "\u05bf\u3000");
  }