public class Main {

public static void main(String[] args) {

// Demonstrate the classes
   //program that has a Shiparray.
// Assign objects to the array elements.
Ship[] shipArray = new Ship[8];
shipArray[0] = new Ship("Wario", 2000);
shipArray[1] = new CruiseShip("Yoshi", 2001, 200);
shipArray[2] = new CruiseShip("Daisy", 1999, 300);
shipArray[3] = new Ship("Luigi", 2001);
shipArray[4] = new Ship("Boo", 2001);
shipArray[5] = new Ship("Koopa Troopa", 2000);
shipArray[6] = new CargoShip("Peach", 2006, 100);
shipArray[7] = new CargoShip("Mario", 2004, 350);

for (Ship ship : shipArray) {
System.out.println(ship.toString());
}
}
}

==================================================


/** Ship.java
*
* Title: Ship, CruiseShip, and CargoShip
*/

public class Ship {
private String shipName;
private int year;

public Ship(String shipName, int year) {
this.shipName = shipName;
this.year = year;
}

public String getShipName() {
return shipName;
}

public void setShipName(String shipName) {
this.shipName = shipName;
}

public int getYear() {
return year;
}

public void setYear(int year) {
this.year = year;
}

@Override
public String toString() {
return this.getShipName() + " built in " + this.getYear();
}
}

========================================================

/**
*
* CruiseShip.java
*/

public class CruiseShip extends Ship{

private int maxPass;

public CruiseShip(String shipName, int year, int maxPass) {
super(shipName, year);
this.maxPass = maxPass;
}

public int getMaxPass() {
return maxPass;
}

public void setMaxPass(int maxPass) {
this.maxPass = maxPass;
}

@Override
public String toString() {
return this.getShipName() + " holds " + this.getMaxPass() + " passengers";
}
}

===========================================================

/**
*
* CargoShip.java
*/

public class CargoShip extends Ship{

private int capacity;

public CargoShip(String shipName, int year, int capacity) {
super(shipName, year);
this.capacity = capacity;
}

public int getCapacity() {
return capacity;
}

public void setCapacity(int capacity) {
this.capacity = capacity;
}

@Override
public String toString() {
return this.getShipName() + " holds " + this.getCapacity() + " tons";
}
}

===========================================================