Question

please write code in java and comment. thanks. the program is about interface .

1. Implement the basics of Fitness and types of Fitness: Aerobic.
2. Implement specific Fitness types such as Swimming, Cycling,

Fitness Task:
public interface Fitness

(10pts) This will be used as a starting point for deriving any specific Fitness type. Every fitness exercise type has one or more muscle group it affects. Therefor a Fitness has the following abstarct method (Note that all methods in an interface are abstract by default):

• public Muscle [ ] muscleTargeted() A method that returns the muscle that is going to be affected by the fitness. Note that the return type of the method is Muscle. A human body has a finite number of muscle parts that can be affected by fitness exercises. Define an enum datatype called Muscle with the follwoing member values Abs,Back,Biceps,Chest,Arms,Glutes,Shoulders,Triceps,Legs,Cardio
• public double calorieLoss(Intensity intensity, double weight, int duration) - returns the total amount of calorie burnt by the exercise for the duration number of minutes for a person with the given weight. Intensity can be HIGH, MEDIUM, LOW. Note that Intensity is a good candidate to be definied as enum.
• public String description() a method that returns a short decription of the fitness type.

Aerobic Task:

(10pts) Aerobic means "with oxygen." The purpose of aerobic conditioning is to increase the amount of oxygen that is delivered to your muscles, which allows them to work longer. Aerobic is a Fitness. However, we cannot give the actual implementation for the methods muscleTargeted() and calorieLoss() as we don't know the actual aerobic exercise. The descripton() method returns the string Aerobic means "with oxygen.". Note that Aerobic is a good candidate to be abstract class.

public class Swimming, which is an Aerobic

This class represents an actual Aerobic exercise, i.e., it extends Aerobic class, that a user can do to burn calories. The calculation of how much calorie will be burn relies on a key value known as a MET, which stands for metabolic equivalent.

Define a class Swimming. The class must include the following:

• public Swimming (SwimmingType type) - defines the constructor for the class. You need to define an enum datatype called SwimmingTypewith members ButterflyStroke,Breaststroke,Freestyle
• public Swimming () - a default constructor for the class that initilizes SwimmingType to Freestyle.
• public void setSwimmingType(SwimmingType type) A setter for the swimmingType.
• public SwimmingType getSwimmingType() A getter for the swimmingType.
• @Override public String description() returns the name of the class.

public class Cycling, which is an Aerobic

(10pts) This class represents an actual Aerobic exercise, i.e., it extends Aerobic class, that a user can do to burn calories. Cycling affects muscles: Glutes, Cardio, Legs. Define a class Cycling. The class also has:

• @Override public String description() returns the name of the class.

Exercise	HIGH	MEDIUM	LOW
Swimming	10.0	8.3	6.0
Cycling	14.0	8.5	4.0
Yoga	4.0	3.0	2.0
Weightlifting	6.0	5.0	3.5
Plyometrics	7.4	4.8	2.5
Tai Chi	5.0	3.0	1.5
Squat	7.0	5.0	2.5
Pull-Up	7.5	6.0	4.8

Answer 1

Solution=> Please do comment in case of any query. Please make sure to read all the comments in the program. I have define all the required class and enum mention in the question.

Code:-

import java.util.*;

//Enum Datatype for Muscle
enum Muscle
{
   Abs, Back, Biceps, Chest, Arms, Glutes, Shoulders, Triceps, Legs, Cardio;
}

//Enum Datatype For Intensity
enum Intensity{
   HIGH, MEDIUM, LOW;
}

//Fitness Interface
interface Fitness
{
// abstract method
   //This method return the array of the muscle that is going to be affected by the Execise
public Muscle[] muscleTargeted();
//This method returns the total amount of calorie burnt by the exercise for the duration number of minutes for a person with the given weigh
public double calorieLoss(Intensity intensity, double weight, int duration);
// returns a short description of the fitness type
public String description();
  
}

//Abstract Class For Aerobic
abstract class Aerobic implements Fitness {
  
   public abstract Muscle[] muscleTargeted();
public abstract double calorieLoss(Intensity intensity, double weight, int duration);
  
public String description() {
   return "Aerobic means \"with oxygen.\".";
}

}

//Enum for SwimmingType
enum SwimmingType{
   ButterflyStroke, Breaststroke, Freestyle;
}

class Swimming extends Aerobic{
  
   private SwimmingType swimmingType;
  
   //Default Constructor for initilizes SwimmingType to Freestyle.
   public Swimming() {
       this.swimmingType=SwimmingType.Freestyle;
   }
  
   //Constructor for initilizes SwimmingType to given type.
   public Swimming(SwimmingType type) {
       this.swimmingType=type;
   }
   //Getter and Setter of swimmingType
   public SwimmingType getSwimmingType() {
       return swimmingType;
   }
  
   public void setSwimmingType(SwimmingType swimmingType) {
       this.swimmingType = swimmingType;
   }
  
   //Return the name of the class
   public String description() {
   return "Swimming";
}
  
   //No information given for this method for the swimming class
   @Override
   public Muscle[] muscleTargeted() {
       // TODO Auto-generated method stub
       return null;
   }

   //No information given for this method for the swimming class
   @Override
   public double calorieLoss(Intensity intensity, double weight, int duration) {
       // TODO Auto-generated method stub
       return 0;
   }
  
  
}

class Cycling extends Aerobic{

   //Return the name of the class
       public String description() {
       return "Cycling";
   }
      
   //
   @Override
   public Muscle[] muscleTargeted() {
       //These are the muscles affects by cycling
       Muscle[] arr = {Muscle.Glutes, Muscle.Cardio, Muscle.Legs};
       return arr;
   }

   ////No information given for the method for the swimming class
   @Override
   public double calorieLoss(Intensity intensity, double weight, int duration) {
       // TODO Auto-generated method stub
       return 0;
   }
  
}

Please do comment in case of any Query.

Hope you will like this answer.

Thanks.