- if (outputWriter instanceof PlainTextWriter w) {
- w.println("Your new username: {}", newUsername);
- } else if (outputWriter instanceof JsonWriter w) {
- w.write(new JsonAccountResponse(newUsername));
+ switch (outputWriter) {
+ case PlainTextWriter w -> w.println("Your new username: {}", newUsername);
+ case JsonWriter w -> w.write(new JsonAccountResponse(newUsername));