Question

This activity will require you to apply your knowledge of interfaces – including the Comparable interface – in order to leverage the capabilities of the ArrayList data structure.

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You may work individually or with a partner, but be sure that each student submits their own assignment in Canvas (and leave a comment with your partner's name if you worked with one).

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Description:

Interfaces are used to make a Class implement a behavior or set of behaviors. Recall the example from class in which the Gradable Interface was used to ensure that the calculateGrade() and getAbsences() methods were implemented by the Student class.

Your goal for this assignment is to create your own example of an Interface and a Class that implements it. You may not use Gradable / Student or Drivable / Vehicle.

• Decide on the Interface that you will be creating. It should include at least three methods and one attribute, and represent a type of behavior. Please use the convention of ending your Interface name in “able” (e.g. drivable). Create this interface in its own file as shown in class.
• Decide on a Class that will implement this interface. In addition to implementing the Interface that you created, you should implement the Comparable interface for your class (as demonstrated in class). Override the compareTo() method in a manner that makes sense for your Class. Also, override the toString() method in a way that displays all relevant information for your Class.  Note that your methods don't need to be exceedingly complex -- just make sure that they do something that makes sense in the context of your class and interface.
• In your main method, create an ArrayList containing 5 instances of your Class. You may hard-code the values for your class attributes in your main method. Sort your ArrayList as demonstrated in class, and display the contents using the enhanced for-loop syntax and overridden toString() method that you created.

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You are welcome to use either VSCode or NetBeans to complete this assignment. If you use VSCode, upload your Java files. If you use NetBeans, export your project to a ZIP file and upload that. Please do not upload any compression formats other than ZIP files. Other formats (e.g. 7zip, tar.gz, etc.) will not be accepted and will result in a grade of zero.

Answer 1

PLEASE GIVE IT A THUMBS UP, I SERIOUSLY NEED ONE, IF YOU NEED ANY MODIFICATION THEN LET ME KNOW, I WILL DO IT FOR YOU

Growable.java

interface Growable
{
   final double DEFAULT_FACTOR=1;
   final double DEFAULT_VALUE=0;
   final double DEFAULT_PERCENT=100;
   public void growByFactor(double factor);
   public void growByValue(double value);
   public void growByPercent(double percent);
}

Fortune.java

class Fortune implements Growable,Comparable<Fortune>
{
   double balance;
   Fortune(double balance)
   {
       this.balance = balance;
   }
  
   public void growByFactor(double factor)
   {
       balance = balance * factor;
   }
  
   public void growByValue(double value)
   {
       balance = balance + value;
   }
  
   public void growByPercent(double percent)
   {
       balance = balance * percent/100.0;
   }
  
   public int compareTo(Fortune obj)
   {
       if (balance<obj.balance) return -1;
       else if (balance>obj.balance) return 1;
       return 0;
   }
  
   public String toString()
   {
       return "Fortune : $"+String.valueOf(balance);
   }  
}

TestFortune.java

import java.util.ArrayList;
import java.util.Collections;
class TestFortune
{
   public static void main(String[] args)
   {
       ArrayList<Fortune> persons = new ArrayList<Fortune>(5);
       Fortune obj;
      
       //Creating 5 objects
       obj = new Fortune(3000.0);
       //obj.growByValue(1000); //will become 4000
       persons.add(obj);
      
       obj = new Fortune(15000.0);
       persons.add(obj);
      
       obj = new Fortune(12000.0);
       //obj.growByFactor(1.50); //will become 18000
       persons.add(obj);
      
       obj = new Fortune(9000.0);
       persons.add(obj);
      
       obj = new Fortune(7500.0);
       //obj.growByPercent(Growable.DEFAULT_PERCENT); //will remain 7500
       persons.add(obj);
      
      
       //Sorting the Arraylist
       Collections.sort(persons);
      
       //Printing the contents of ArrayList
      
       for (Fortune y : persons)
       {
           System.out.println(y.toString());
       }
      
   }
}