Java com. 包命名空间 [重复]

Java com.* 包命名空间

java
package com.carrental;
public class Car {
    private String brand;
    private String model;
    private String color;
    
    // Constructors, getters, and setters
    
    public void startEngine() {
        // Code to start the car's engine
    }
    
    public void stopEngine() {
        // Code to stop the car's engine
    }
}
package com.carrental;
public class RentalSystem {
    private List availableCars;
    private List rentedCars;
    
    // Constructors, getters, and setters
    
    public void rentCar(Customer customer, Car car) {
        // Code to rent a car to a customer
    }
    
    public void returnCar(Customer customer, Car car) {
        // Code to return a rented car
    }
}
package com.carrental;
public class Customer {
    private String name;
    private String address;
    
    // Constructors, getters, and setters
    
    public void rentCar(Car car) {
        // Code for a customer to rent a car
    }
    
    public void returnCar(Car car) {
        // Code for a customer to return a rented car
    }
}