Question

Design MountainBike and RoadBike class for a simulation game

Mike is a programmer working in his afterhours to design games for mobile platforms. His recent

project is a simulation game in which a player controls a bike to move across a variety of simulated

environments. To start coding, Mike has to design a collection of bikes including a mountain bike

and a road bike, so that the player can choose the preferred bike. He is now implementing two

classes, MountainBike and RoadBike, to simulate the behavior of the bikes.

In MountainBike, Mike is going to implement the fields and methods:

MountainBike

+cadence: double //pedalling rate (per minute)

+gear:int

+speed:double

+suspension:string // type of the suspension

MountainBike() //a constructer

+setCadence:void

+setGear:void

+setSpeed:void

+setSuspension:void

+brake():void // method to apply brake to reduce speed

+accelerate():void //method to accelerate the bike

+toString:string //print a snapshot of the current condition of the bike

In RoadBike, Mike is going to implement the following fields and methods:

RoadBike

+cadence: double //pedalling rate (per minute)

+gear:int

+speed:double

+tire:string // type of the tires

RoadBike() //a constructer

+setCadence:void

+setGear:void

+setSpeed:void

+setTire:void

+brake():void // method to apply brake to reduce speed

+accelerate():void //method to accelerate the bike

+toString:string //print a snapshot of the current condition of the bike

Page 2

Could you help Mike to design both classes?

Answer 1

Java code for the given requirement:

MountainBike class:

public class MountainBike {
  
   //instance variables
   public double cadence;
   public int gear;
   public double speed;
   public String suspension;
  
   //a constructor
   public MountainBike(double cadence, int gear, double speed, String suspension) {
       super();
       this.cadence = cadence;
       this.gear = gear;
       this.speed = speed;
       this.suspension = suspension;
   }

   //methods
   public void setCadence(double cadence) {
       this.cadence = cadence;
   }

   public void setGear(int gear) {
       this.gear = gear;
   }

   public void setSpeed(double speed) {
       this.speed = speed;
   }

   public void setSuspension(String suspension) {
       this.suspension = suspension;
   }
  
   public void brake(){
       //reduce the speed to 0
       this.speed = 0;
   }
   public void accelerate(){
      
   }

   @Override
   public String toString() {
       return "MountainBike [cadence=" + cadence + ", gear=" + gear + ", speed=" + speed + ", suspension=" + suspension
               + "]";
   }
  
}

RoadBike class:

public class RoadBike {

   //instance variables
   public double cadence;
   public int gear;
   public double speed;
   public String tire;
  
   //a constructor
   public RoadBike(double cadence, int gear, double speed, String tire) {
       super();
       this.cadence = cadence;
       this.gear = gear;
       this.speed = speed;
       this.tire = tire;
   }

   //methods
   public void setCadence(double cadence) {
       this.cadence = cadence;
   }

   public void setGear(int gear) {
       this.gear = gear;
   }

   public void setSpeed(double speed) {
       this.speed = speed;
   }

   public void setTire(String tire) {
       this.tire = tire;
   }
  
   public void brake(){
       //reduce the speed to 0
       this.speed = 0;
   }
   public void accelerate(){
      
   }

   @Override
   public String toString() {
       return "RoadBike [cadence=" + cadence + ", gear=" + gear + ", speed=" + speed + ", tire=" + tire + "]";
   }
  
}