Question

Design a Ship class that 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 accessors and mutators. A toString method that displays the ship’s 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 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 and appropriate accessors and mutators. A 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.

I need user input aka asking the user to input a ship name, the number of passengers, and the year.

Answer 1

Hi,

Please find the answer below:
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Java Classes :

Ship.java

public class Ship {
   protected String shipName;
   protected String year;

   // Ship Constructor
   public Ship(String ship, String year) {
       this.shipName = ship;
       this.year = year;
   }

   // Ship get methods
   public String getShipName()   {
       return shipName;
   }

   public String getYear(){
       return year;
   }

   // Override toString method
   public String toString(){
       return "Ship Name : " + getShipName() +
               "\nBuilt Year : " + getYear();
   }
}

////////////////////

CruiseShip.java

public class CruiseShip extends Ship {
   private int maxPassengers;

   //CruiseShip Constructor
   public CruiseShip(String ship,String year, int maxPassengers){
       super(ship, year);
       this.maxPassengers = maxPassengers;
   }

   //get method
   public int getMaxPassengers(){
       return maxPassengers;
   }

   //overridden toString
   public String toString(){
       return "CruiseShip Name : " + getShipName() +
               "\nMaximum Number of Passengers : " + getMaxPassengers();
   }
}

//////////////////

CargoShip.java

public class CargoShip extends Ship {
   private int cargoCapacityTons;
  
   //CargoShip Constructor
public CargoShip(String name, String year, int tons) {
   super(name, year);
   this.cargoCapacityTons = tons;
}

//cargo get method
public int getCargoCapacityTons() {
   return cargoCapacityTons;
}

//Overridden toString method
public String toString() {
   return "CargoShip Name : " + getShipName() +
           "\nShip Cargo Capacity : " + getCargoCapacityTons();
   }
}

////////////////////

ShipMain.java

import java.util.Scanner;

public class ShipMain {
   public static void main(String[] args) {
       String name;
       int maxNoPass;
       String year;
       try {
           //Take Input from user
           Scanner console = new Scanner(System.in);
           System.out.println("Enter the name of the ship: ");
           name=console.nextLine();
           System.out.println("Enter the number of passengers: ");
           maxNoPass=Integer.parseInt(console.nextLine());
           System.out.println("Enter the year the ship was built: ");
           year=console.nextLine();
           //Build a ship object
           CruiseShip cruiseShipObj= new CruiseShip(name,year,maxNoPass);
           System.out.println(cruiseShipObj.toString());
       }catch(Exception e) {
           e.printStackTrace();
       }
   }
}

///////////////////////////////

Sample Program Output:

Enter the name of the ship:
Pacific Liner
Enter the number of passengers:
1000
Enter the year the ship was built:
1999
CruiseShip Name : Pacific Liner
Maximum Number of Passengers : 1000

Screenshot:

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Hope this helps.
Let me know if you need more help with this.
Kindly, like the solution if you find it useful
Thanks.