Question

In Java, create an abstract vehicle class. Create a Truck Class that Inherits from Vehicle Class. The vehicle class should contain at least 2 variables that could pertain to ANY vehicle and two methods. The truck class should contain 2 variables that only apply to trucks and one method. Create a console program that will instantiate a truck with provided member information then call one method from the truck and one method contained from the inherited vehicle class. Have these methods print something to the console.

Answer 1

PROGRAM:

abstract class Vehicle //abstract class
{
   String name;
   String brand;
  
   public abstract String getName(); //abstract method to get name of vehicle
   public abstract String getBrand(); //abstract method to get brand of vehicle

}
class Truck extends Vehicle //truck class is inherited from abstract vehicle class using extends keyword
{
   int capacity; //capacity of truck
   int noAxels; //number of wheels of truck
   public Truck(int capacity,int noAxels,String name,String brand) //parameterized constructoe to initialise variables
   {
       this.capacity=capacity;
       this.noAxels=noAxels;
       super.name=name; // super keyword is used to access parent class methods and variables
       super.brand=brand; //setting brand value
   }
   public String getName() // to get name of the truck
   {
       return this.name;
   }
   public String getBrand() //to get brand of truck
   {
       return this.brand;
   }

// to get the information of truck
   public String toString() {
       String str="Truck "+getName()+" has "+this.noAxels+" Axels with capacity "+this.capacity;
return str;
      
   }
   public static void main(String args[]){
       Vehicle v=new Truck(10,4,"ABC","XYZ"); // truck class is instantiated by using vehicle class
       System.out.println("Truck name: "+v.getName()); //print name of truck
       System.out.println("Truck BRand: "+v.getBrand()); //print bran of truck
       System.out.println(v.toString()); //print truck information
   }
  
}

OUTPUT: