Ship, CruiseShip, CargoShip Classes, andÂ DisplayableÂ Interface
Design anÂ abstractÂ ShipÂ class that has the following members:
â€¢ A field for the name of the ship (a string).â€¢ A field for the year that the ship was built (a string). â€¢ A constructor and appropriate accessor and mutators.â€¢ AÂ toStringÂ method that displays the ships name and the year it was built.
Design aÂ CruiseShipÂ class that extends theÂ ShipÂ class. TheÂ CruiseShipÂ class should have the following members:
â€¢ A field for the maximum number of passengers (an int).â€¢ A constructor, a copy constructor, and appropriate accessors and mutators.â€¢ AÂ toStringÂ method that overrides theÂ toStringÂ method in the base class. TheÂ CruiseShipÂ class’s toString method should display only the shipâ€™s name and the maximum number of passengers.
Design aÂ CargoShipÂ class that extends theÂ ShipÂ class. TheÂ CargoShipÂ class should have the following members:
â€¢ A field for the cargo capacity in tonnage (an int).â€¢ A constructor, a copy constructor, and appropriate accessors and mutators.â€¢Â toStringÂ method that overrides theÂ toStringÂ method in the base class. TheÂ CargoShipÂ class’sÂ toStringÂ method should display only the shipâ€™s name and the ship’s cargo capacity.
In a driver program (shipDemo.java)
â€¢ Demonstrate the classes in a Ship array. Assign variousÂ CruiseShipÂ andÂ CargoShipÂ objects to the array elements. The program should then step through the array, calling each object’sÂ displayÂ method. (polymorphism)â€¢ Create an ArrayList of Ship objects and add variousÂ CruiseShipÂ andÂ CargoShipÂ objects to the array list. The program should then step through the array list, calling each object’sÂ toStringÂ method. (polymorphism)â€¢ Test your copy constructors in bothÂ CruiseShipÂ andÂ CargoShipÂ in shipDemo.java
Interface toÂ yourÂ lab 3 (Ship implements Displayable).
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