Ship, CruiseShip, CargoShip Classes, and Displayable Interface

Design an abstract Ship class that has the following members:

• A field for the name of the ship (a string).• A field for the year that the ship was built (a string). • A constructor and appropriate accessor and mutators.• A toString method that displays the ships name and the year it was built.

Design a CruiseShip class that extends the Ship class. The CruiseShip class should have the following members:

• A field for the maximum number of passengers (an int).• A constructor, a copy constructor, and appropriate accessors and mutators.• A toString method that overrides the toString method in the base class. The CruiseShip class’s toString method should display only the ship’s name and the maximum number of passengers.

Design a CargoShip class that extends the Ship class. The CargoShip class should have the following members:

• A field for the cargo capacity in tonnage (an int).• A constructor, a copy constructor, and appropriate accessors and mutators.• toString method that overrides the toString method in the base class. The CargoShip class’s toString method should display only the ship’s name and the ship’s cargo capacity.

In a driver program (shipDemo.java)