Switch Java 12 on the SSaurel's Channel

SwitchJava12.java

public static boolean boolean isWeekend(String day) {
 return switch (day) {
  case "mon", "tue", "wed", "thu", "fri" -> false;
  case "sat", "sun" -> true;
  default -> {
   if (day.startsWith("s")) {
    System.out.println("It seems to be a weekend day");
    break true;
   }

   System.out.printf("Unknown day: %s%n", day);
   break false;
  }
 };
}