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src/edu/africa/TripToAfrica.java

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+package edu.africa;
+//TIP To <b>Run</b> code, press <shortcut actionId="Run"/> or
+// click the <icon src="AllIcons.Actions.Execute"/> icon in the gutter.
+import edu.trip.AirplaneReservation;
+import edu.trip.HotelReservation;
+import edu.trip.Person;
+import edu.trip.RentalCarReservation;
+import edu.trip.Trip;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+
+public class TripToAfrica {
+    public static void main(String[] args) throws Exception {
+        try (var executor = Executors.newVirtualThreadPerTaskExecutor()) {
+            Future<Float> future = executor.submit(() -> {
+                Trip trip = new Trip();
+                trip.theme = "Going To Africa";
+                trip.organizer= new Person();
+                trip.addReservation(new HotelReservation());
+                trip.addReservation(new AirplaneReservation());
+                trip.addReservation(new RentalCarReservation());
+
+                return trip.calculatePrice();
+
+            });
+            System.out.println("done: " + future.get());
+        }
+    }
+}