Question

Define a JAVA class ISP. The class consists of the name of the subscription plan and a
method that display the plan. Derive a class DPlan from ISP. The DPlan will charge
RM10 per Mbps subscribe and RM0.20 per GB used. Derive a class MPlan from ISP.
The MPlan will charge RM5 per Mbps subscribe and RM0.80 per GB used. Display
the plan and select the best plan.

Answer 1

Note: Could you plz go through this code and let me know if u need any changes in this.Thank You
=================================

// ISP.java

public class ISP {
   private String subscriptionPlan;

   /**
   * @param subscriptionPlan
   */
   public ISP(String subscriptionPlan) {
       this.subscriptionPlan = subscriptionPlan;
   }

   /**
   * @return the subscriptionPlan
   */
   public String getSubscriptionPlan() {
       return subscriptionPlan;
   }

   /**
   * @param subscriptionPlan
   * the subscriptionPlan to set
   */
   public void setSubscriptionPlan(String subscriptionPlan) {
       this.subscriptionPlan = subscriptionPlan;
   }

   /*
   * (non-Javadoc)
   *
   * @see java.lang.Object#toString()
   */
   @Override
   public String toString() {
       return "Subscription Plan = " + subscriptionPlan;
   }

}

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// DPlan.java

public class DPlan extends ISP {
   private double mbps;
   private double GBUsed;

   /**
   * @param subscriptionPlan
   * @param mbps
   * @param gBUsed
   */
   public DPlan(String subscriptionPlan, double mbps, double GBUsed) {
       super(subscriptionPlan);
       this.mbps = mbps;
       this.GBUsed = GBUsed;
   }

   /**
   * @return the mbps
   */
   public double getMbps() {
       return mbps;
   }

   /**
   * @param mbps
   * the mbps to set
   */
   public void setMbps(double mbps) {
       this.mbps = mbps;
   }

   /**
   * @return the gBUsed
   */
   public double getGBUsed() {
       return GBUsed;
   }

   /**
   * @param gBUsed
   * the gBUsed to set
   */
   public void setGBUsed(double gBUsed) {
       GBUsed = gBUsed;
   }

   public double totalCost() {
       double price = 0.0;
       price = mbps * 10 + GBUsed * 0.20;
       return price;
   }

   /*
   * (non-Javadoc)
   *
   * @see java.lang.Object#toString()
   */
   @Override
   public String toString() {
       return super.toString() + "\nMbps = " + mbps + "\nGBUsed = " + GBUsed
               + "\nTotal Price :$" + totalCost();
   }

}

===========================================

===========================================

// MPlan.java

public class MPlan extends ISP {
   private double mbps;
   private double GBUsed;

   /**
   * @param subscriptionPlan
   * @param mbps
   * @param gBUsed
   */
   public MPlan(String subscriptionPlan, double mbps, double GBUsed) {
       super(subscriptionPlan);
       this.mbps = mbps;
       this.GBUsed = GBUsed;
   }

   /**
   * @return the mbps
   */
   public double getMbps() {
       return mbps;
   }

   /**
   * @param mbps
   * the mbps to set
   */
   public void setMbps(double mbps) {
       this.mbps = mbps;
   }

   /**
   * @return the gBUsed
   */
   public double getGBUsed() {
       return GBUsed;
   }

   /**
   * @param gBUsed
   * the gBUsed to set
   */
   public void setGBUsed(double gBUsed) {
       GBUsed = gBUsed;
   }

   public double totalCost() {
       double price = 0.0;
       price = mbps * 5 + GBUsed * 0.80;
       return price;
   }

   /*
   * (non-Javadoc)
   *
   * @see java.lang.Object#toString()
   */
   @Override
   public String toString() {
       return super.toString()+"\nMbps = " + mbps + "\nGBUsed = " + GBUsed+"\nTotal Price :$"+totalCost();
   }

}

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// Test.java

import java.util.Scanner;

public class Test {

   public static void main(String[] args) {

       int choice,mbps;
       double noOfGBUsed,dPrice=0.0,mPrice=0.0;
       /*
       * Creating an Scanner class object which is used to get the inputs
       * entered by the user
       */
       Scanner sc = new Scanner(System.in);

       // Getting the input entered by the user
       System.out.print("Enter the No of MBPS :");
       mbps=sc.nextInt();
       System.out.print("Enter the No of GB of data used :");
       noOfGBUsed=sc.nextInt();
      
       DPlan dp=new DPlan("DPlan", mbps, noOfGBUsed);
       MPlan mp=new MPlan("MPlan", mbps, noOfGBUsed);
       dPrice=dp.totalCost();
       mPrice=mp.totalCost();
       System.out.println("\n-------------------------");
       System.out.println(dp);
       System.out.println("-------------------------");
       System.out.println(mp);
       System.out.println("-------------------------");
      
       if(dPrice<mPrice)
       {
           System.out.println("\nThe Bst Plan is :"+dp.getSubscriptionPlan());
       }
       else
       {
           System.out.println("\nThe Bst Plan is :"+mp.getSubscriptionPlan());
       }
      
      
   }

}

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Output:

=====================Could you plz rate me well.Thank You