OverridingFinalToStringPuzzle.java

/** In memory of @crazybob, who loved puzzles like this. */
public class OverridingFinalToStringPuzzle {
    private static class Bull {
        public final String toString() {
            return "Bull";
        }
    }

    public static String convert(Bull bull) {
        return "%s".formatted(bull);
    }

    // Don't change anything above this line
    public static void main(String... args) {
        // TODO: Change this method so that the converted String becomes "Bear"
        //   without any command line flags (thus no deep reflection on String)
        String result = convert(new Bull());
        if (!result.equals("Bear"))
            throw new AssertionError("Should be \"Bear\"");
        System.out.println("All good!");
    }
}