Question

IN JAVA Inheritance Using super in the constructor Using super in the method Method overriding

Write an application with five classes Vehicle, Car, Bus, Truck, and Tester class with main method in it.

The following characteristics should be used: make, weight, height, length, maxSpeed, numberDoors, maxPassenges, isConvertable, numberSeats, maxWeightLoad, and numberAxels.

Characteristics that are applicable to all vehicles should be instance variables in the Vehicle class. The others should be in the class(s) where they belong.

Class vehicle should have constructor that initializes all its data. Classes Car, Bus, and Truck will have constructors which will reuse their parents constructor and provide additional code for initializing their specific data.

Class Vehicle should have toString method that returns string representtion of all vehicle data. Classes Car, Bus, and Truck will override inherited toString method from class vehicle in order to provide appropriate string representation of all data for their classes which includes inherited data from Vehicle class and their own data.

Class Tester will instantiate 1-2 objects from those four classes (at least five total) and it will display the information about those objects by invoking their toString methods.

Submit one word document with code for all five classes, picture of program run from blueJ, and picture of UML diagram.

Answer 1

public class Vehicle
{
    /*Start of Vehicle class instance variable declarations*/

    String make = null;
    double weight = 0.0d;
    double height = 0.0d;
    double length = 0.0d;
    double maxSpeed = 0.0d;
    int numberDoors = 0;
    boolean isConvertable = false;
    int numberSeats = 0;
    int numberAxels = 0;

    /*End of Vehicle class instance variable declarations*/

    //Vehical Class No-Argument Constructor
    public Vehicle()
    {
        System.out.println("Enter Default Constructor for Vehicle Class");
    }

    //Vehical Class Parameterized Constructor
    public Vehicle(String make, double weight, double height, double length, double maxSpeed, int numberDoors, boolean isConvertable, int numberSeats, int numberAxels)
    {
        this.make = make;
        this.weight = weight;
        this.height = height;
        this.length = length;
        this.maxSpeed = maxSpeed;
        this.numberDoors = numberDoors;
        this.isConvertable = isConvertable;
        this.numberSeats = numberSeats;
        this.numberAxels = numberAxels;
    }

    //Overriding toString() of Object Class
    public String toString()
    {
        return "Make-"+make+" Corp. : Weight-"+weight+" Kgs : Height-"+height+" meters : Length-"+length+" meters : MaxSpeed-"+maxSpeed+" KMPH : NumberOfDoors-"+numberDoors+" : IsConvertable-"+isConvertable+" : NumberOfSeats-"+numberSeats+" : NumberOfAxels-"+numberAxels;
    }

}

//bus class extending its parent class vehicle

public class Bus extends Vehicle
{
/*Start of Bus class instance variable declarations*/

int maxPassengers = 0;

/*End of Bus class instance variable declarations*/

//Bus Class No-Argument Constructor
public Bus()
{
System.out.println("Enter Default Constructor for Bus Class");
}

//Bus Class Parameterized Constructor
public Bus(String make, double weight, double height, double length, double maxSpeed, int numberDoors, boolean isConvertable, int numberSeats, int numberAxels, int maxPassengers)
{
super(make,weight,height,length,maxSpeed,numberDoors,isConvertable,numberSeats,numberAxels);
this.maxPassengers = maxPassengers;
System.out.println("This is a Bus");
}

//Overriding toString() of Vehicle Class
public String toString()
{
String retString = super.toString();
return retString+" : MaxPassengers-"+maxPassengers;
}

}

//car class exending vehicle

public class Car extends Vehicle
{
/*Start of Car class instance variable declarations*/

int maxPassengers = 0;

/*End of Car class instance variable declarations*/

//Car Class No-Argument Constructor
public Car()
{
System.out.println("Enter Default Constructor for Car Class");
}

//Car Class Parameterized Constructor
public Car(String make, double weight, double height, double length, double maxSpeed, int numberDoors, boolean isConvertable, int numberSeats, int numberAxels, int maxPassengers)
{
super(make,weight,height,length,maxSpeed,numberDoors,isConvertable,numberSeats,numberAxels);
this.maxPassengers = maxPassengers;
System.out.println("This is a Car");
}

//Overriding toString() of Vehicle Class
public String toString()
{
String retString = super.toString();
return retString+" : MaxPassengers-"+maxPassengers;
}
}

//truck class extending vehicle

public class Truck extends Vehicle
{

/*Start of Truck class instance variable declarations*/

double maxWeightLoad = 0.0d;

/*End of Truck class instance variable declarations*/

//Truck Class No-Argument Constructor
public Truck()
{
System.out.println("Enter Default Constructor for Truck Class");
}

//Truck Class Parameterized Constructor
public Truck(String make, double weight, double height, double length, double maxSpeed, int numberDoors, boolean isConvertable, int numberSeats, int numberAxels, double maxWeightLoad)
{
super(make,weight,height,length,maxSpeed,numberDoors,isConvertable,numberSeats,numberAxels);
this.maxWeightLoad = maxWeightLoad;
System.out.println("This is a Truck");
}

//Overriding toString() of Vehicle Class
public String toString()
{
String retString = super.toString();
return retString+" : MaxWeightLoad-"+maxWeightLoad+" Tonns";
}
}

//tester class with main method

public class Testor
{
public Testor()
{
System.out.println("Enter Default Constructor for Testor Class");
}
public static void main(String[] args)
{
Vehicle vehicle1 = new Car("Mercedez AMG Benz",1050,1.5,4,220.3,4,false,4,2,4);
System.out.println(vehicle1.toString());
Vehicle vehicle2 = new Bus("Tata Marcopolo",2050,2.1,7,100.4,3,true,72,3,72);
System.out.println(vehicle2.toString());
Vehicle vehicle3 = new Truck("Ashok Layland",1980,2.2,9.8,80.7,3,false,4,3,72);
System.out.println(vehicle3.toString());
}
}

//uml diagram

//Result of the code