public String deliver(Deliverable deliverable) { // Complete the missing code here this.routingStrategy = routingStrategy; } public void setRoutingStrategy(RoutingStrategy routingStrategy) { this.routingStrategy = routingStrategy; } public Car(RoutingStrategy routingStrategy) { // Complete the missing code here }

In this question, we're dealing with a Java programming problem involving object-oriented principles. The code snippet provided is part of a class that appears to involve delivering some kind of item, likely using a strategy pattern to determine how that item is routed.
Here's a step-by-step breakdown of the missing pieces in the code:

Constructor Completion :
The given constructor public Car(RoutingStrategy routingStrategy) needs to initialize the routingStrategy attribute with the value passed to it as a parameter. It should look like this:
public Car(RoutingStrategy routingStrategy) { this.routingStrategy = routingStrategy; }
This constructor takes a RoutingStrategy object and assigns it to the class's private field routingStrategy, thus allowing the Car object to know which routing strategy to use.

deliver Method :
Similarly, the deliver method's missing code is likely about using the routingStrategy to deliver a Deliverable. Here's how you might complete it:
public String deliver(Deliverable deliverable) { return this.routingStrategy.route(deliverable); }
In this code, the deliver method uses the routing strategy (presumably a method named route) to determine how to deliver the Deliverable object, and it returns a String presumably describing the outcome or status of the delivery.


These corrections fit well within object-oriented programming, illustrating the use of classes, constructors, and method implementations in Java.

Answered by MasonWilliamTurner | 2025-07-06