If you are a contributor, the maintainers are currently seeking help with (appropriately numbered) regarding multi-car collision resolution.
: Proficiency in using super() , method overriding, and dynamic method lookup. 9.6.7 cars github
: By storing both types in an ArrayList , students learn that the Java compiler checks the declared type ( Car ) during compilation, but the Java Virtual Machine (JVM) executes the specific method of the actual object type ( ElectricCar ) at runtime. Implementation and Structure If you are a contributor, the maintainers are
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import java.util.*; public class CarTester public static void main(String[] args) Scanner input = new Scanner(System.in); ArrayList cars = new ArrayList (); while (true) System.out.println("Model (exit to quit): "); String model = input.nextLine(); if (model.equals("exit")) break; System.out.println("Electric car (y/n): "); String isElectric = input.nextLine(); if (isElectric.equals("y")) cars.add(new ElectricCar(model)); else cars.add(new Car(model)); // Deep text/output loop for (Car c : cars) System.out.println(c); Use code with caution. Copied to clipboard Key Takeaways for "9.6.7 Cars" Implementation and Structure : import java