EnumeratorDemo.java

// An enumeration of Transport varieties.
enum Transport {
    CAR, TRUCK, AIRPLANE, TRAIN, BOAT
}
class EnumeratorDemo {
    public static void main(String[] args)
    {
        Transport tp;
        tp = Transport.AIRPLANE;
        // Output an enum value.
        System.out.println("Value of tp: " + tp);
        System.out.println();
        tp = Transport.TRAIN;

        // Compare two enum values.
        if (tp == Transport.TRAIN)
            System.out.println("tp contains TRAIN.\n");

        // Use an enum to control a switch statement.
        switch (tp) {
            case CAR:
                System.out.println("A car carries people.");
                break;
            case TRUCK:
                System.out.println("A truck carries freight.");
                break;
            case AIRPLANE:
                System.out.println("An airplane flies.");
                break;
            case TRAIN:
                System.out.println("A train runs on rails.");
                break;
            case BOAT:
                System.out.println("A boat sails on water.");
                break;
        }
    }
}