Switch Java 12 on the SSaurel's Channel

SwitchJava12.java

public class SwitchJava12 {

 public static void main(String[] args) {

  // Here, we consider that args[0] corresponds to the day of the week
  final int day = Integer.valueOf(args[0]);

  // Use of the traditional switch
  switch (day) {
    case 1:
    case 2:
    case 3:
    case 4:
    case 5:
     System.out.println("Day of the week");
     break;
    case 6:
    case 7:
     System.out.println("Weekend");
    break;
    default:
     System.out.println("Invalid");
  }

  // Use of the new syntax case L ->
  // No need to use a station wagon when it 
  // there is only one instruction behind the arrow
  switch (day) {
   case 1, 2, 3, 4, 5 -> System.out.println("Day of the week");
   case 6, 7 -> System.out.println("Weekend");
   default -> System.out.println("Invalid");
  }

  // Using a switch as an expression
  final String attr =
   switch (day) {
    case 1, 2, 3, 4, 5 -> "Day of the week";
    case 6, 7 -> "Weekend";
    default -> "Invalid";
   };

  System.out.println(attr);

 }
}