Twitter Page 1 1 2 Question 2 (35 points) public class Plan Demo 3 public static void main(String args) CommercialPlan cp new CommercialPlan(12345, 5001 Java blvd, San Diego, CA 92111 , Engineering , 350 0 5) new Residential Plan (10035, 222 Java In, San Diego, CA 92000 , 2, 2400 0) 4 5 ResidentialPlan rp rp setNumberOfStories(4) System out println(cp) System out println() System out println(rp) public class CommercialPlan private int parcelNumber private String address private String business Type Favor private double area public String approval Process() String result if(area 3000) result t1 Get permit from the city commercial unit else result t1 Get permit from the city commercial unit t2 Get approval from business office return result public String toString() public class ResidentialPlan tes AirDi Rece Appli Dow Red Page 1 1 2 3 4 5 C (10 Points) Create a new class called Plan Demo2 java and in its main method implement the following 1 Create two reference variables of type Plan called planCP and planRP 2 Assign planCP to an instance of the new CommercialPlan class that you created in part B and assign planRP to an instance of the new ResidentialPlan class that you also created in part B 3 Print both planCP and planRP variables and specify whether the toString() method of the Plan class is called or the toString() methods of the planCP and plan RP classes are called a Explain why the above has happened b In Object Oriented paradigm, what is this phenomenon called 4 Call planRP getNumberOfStories() in PlanDemo2 java a What is the result Explain why it is happening b If there is an issue, just explain how it can be fixed (writing code to fix the issue is not necessary) 5 Submit Plan java, CommercialPlan java, ResidentialPlan java, PlanDemo java and PlanDemo2 java files in a zip file hot 09 AM hot 27 AM hot 36 AM hot 37 PM Yello Paragraph BI U A Oran IIII O hot 46 PM hot 01 PM Page 1 1 1 2 1 1 4 5 1 3 H public class Residential Plan private int parcelNumber private String address private int numberOfStories private double area public String approvalProcess() return t1 Get permit from the city residential unit public String toString() In the above code, the Plan Demo class creates instances of Commercial Plan and Residential Plan classes, calls the setNumberOfStories method of the Residential Plan class instance and prints both instances Your task is to complete the above classes as follows A (10 Points) 1 Copy the above classes into their corresponding java files in an IDE of your choice 2 Complete Commercial Plan and Residential Plan classes by adding a Constructors i Commercial Plan order of parameters 1 (parcelNumber, String address, String business Type, double area) ii Residential Plan order of parameters 1 (parcelNumber, String address, int numberOfStories, double area) b Setter and getter methods for all their instance variables c Complete the toString method of each class 2 Run PlanDemo java and verify that its output is shown without any errors Although, PlanDemo java runs fine, however, Commercial Plan and ResidentialPlan classes have a lot of duplicate code B (15 Points) Use Inheritance to reduce code duplication, as follows 1 Create a class called Plan java This class will contain the code that is in common between Page 1 1 2 4 5 1 3 B (15 Points) Use Inheritance to reduce code duplication, as follows 1 Create a class called Plan java This class will contain the code that is in common between Commercial Plan and ResidentialPlan classes 2 Add a constructor method to the Plan class, which receives values for all instance variables of the Plan class as parameters (Note Do Not add a default constructor to the Plan class) 3 Add a toString() method to the Plan class, which prints all the instance variables of the class 4 Modify Commercial Plan and Residential Plan classes to create new classes that inherit and use the common code from the Plan java rather than duplicating them 5 The approval Process () method, is a good candidate to be implemented as an abstract method a Explain why this method should be implemented as an abstract method b Implement this method as an abstract method 6 Run the PlanDemo java to verify that it runs correctly with your new classes Specifically, make sure the toString() methods of the new Commercial Plan and Residential Plan classes are working correctly Note You should not change the PlanDemo java class to answer part B C (10 Points) Create a new class called PlanDemo2 java and in its main method implement the following 1 Create two reference variables of type Plan called planCP and plan RP 2 Assign planCP to an instance of the new Commercial Plan class that you created in part B and assign planRP to an instance of the new ResidentialPlan class that you also created in part B 3 Print both planCP and planRP variables and specify whether the toString() method of the Plan class is called or the toString() methods of the planCP and planRP classes are

Question: Twitter Page 1: 1 2 Question 2 (35 points) public class Plan Demo 3 { { public static void main(String[] args) CommercialPlan cp =

Twitter Page 1: 1 2 Question 2 (35 points) public class Plan Demo 3 { { public static void main(String[] args) CommercialPlan cp = new CommercialPlan(12345, "5001 Java blvd, San Diego, CA 92111", "Engineering", 350 0.5); = new Residential Plan (10035, "222 Java In, San Diego, CA 92000", 2, 2400.0); -- -- -- 4 5 ResidentialPlan rp rp.setNumberOfStories(4); System.out.println(cp); System.out.println(); System.out.println(rp); } } public class CommercialPlan { private int parcelNumber; private String address; private String business Type; Favor { private double area; public String approval Process() String result; if(area

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