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The QObject class is a simplified application of the composite pattern because it plays the role of all the classes in the pattern. True or false
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- Rename the show method to people Override the show method in student and in the other class you created (this will be the polymorphic method) In main program, create an array of 3 objects of class people Instantiate each array position with a different object (people, student, other) With a loop, display all the objects in the array.The code given below represents a saveTransaction() method which is used to save data to a database from the Java program. Given the classes in the image as well as an image of the screen which will call the function, modify the given code so that it loops through the items again, this time as it loops through you are to insert the data into the salesdetails table, note that the SalesNumber from the AUTO-INCREMENT field from above is to be inserted here with each record being placed into the salesdetails table. Finally, as you loop through the items the product table must be update because as products are sold the onhand field in the products table must be updated. When multiple tables are to be updated with related data, you should wrap it into a DMBS transaction. The schema for the database is also depicted. public class PosDAO { private Connection connection; public PosDAO(Connection connection) { this.connection = connection; } public void…Define a class called Book. This class should store attributes such as the title, ISBN number, author, edition, publisher, and year of publication. Provide get/set methods in this class to access these attributes. Define a class called Bookshelf, which contains the main method. This class should create a few book objects with distinct names and store them in an ArrayList. This class should then list the names of all books in the ArrayList. Enhance the program by providing a sort function, which will sort the books in ascending order of their year of publication. Create a few more Bookobjects with the same names but with different edition numbers, ISBNs, and years of publication. Add these new Book objects to the ArrayList, and display the book list sorted by book name; for duplicate books of the same name, sort the list by year of publication. (Hint: You will need to define a comparator class that takes two Book objects as parameters of the compareTo This method should do a two-step…
- Use the right loop for the right assignment, using all the follow- ing loops: for, while without hasNext(), while with hasNext() and do-while. So I cannot use array. it has to be done in java.If you apply the Visitor design pattern in your design, it becomes easy to add new ConcreteElement classes to the Element hierarchy. Is this true or false?How can you evaluate the state of an ArrayList to assess how effectively it is functioning?
- Add a list of procedures in your patient class, fill them and print them with the patient data. This is called composition which is a "has a" relationship. A patient has procedures. Write a class named Patient that has attributes for the following data: First name, middle name, and last name Address, city, state, and ZIP code Phone number Name and phone number of emergency contact The Patient class’s _ _init_ _ method should accept an argument for each attribute. The Patient class should also have accessor and mutator methods for each attribute. Next, write a class named Procedure that represents a medical procedure that has been performed on a patient. The Procedure class should have attributes for the following data: Name of the procedure Date of the procedure Name of the practitioner who performed the procedure Charges for the procedure The Procedure class’s _ _init_ _ method should accept an argument for each attribute. The Procedure class should also have accessor and mutator…We have two classes; these classes are "Car" and "Price".The "car" class is a class that keeps the id and price of the car.If the "Price" class is, there will be get / set methods for the segment of the fee (For example Y segment Z segment), the number of cars, and the "Car" class list.In the "Price" class, there should be a print method to add / remove cars to the list and find the ids of Vehicles whose segments are equal to X.The segments are as follows. 0$ -15999$ -> Y Segment16000$-24999$ -> Z Segment25000$-50000$ -> T Segment It is necessary to use "Single Linked List".The program should be written in JAVA.Def for it.
- This lab was designed to reinforce programming concepts from this lab, you will practice: Declaring and initializing ArrayList. Add elements to the Arraylist. Display the content of the ArrayList. Write a class name PhoneBookEntry that has fields for a person’s name and phone number. The class should have a constructor and the appropriate accessor and mutator methods. Then write a program that creates at least 5 PhoneBookEntry objects and stores them in an ArrayList. Use a loop to display the contents of each object in the ArrayList.In this java assignment, we will need to use arraylists so we can store data for an employee. If the user wants to enter data for more than one employee, it should print like this: Employee ListId Name ----------------------- 1. First Name 2. Bob Smith If the user only enters one employee, it should print out a paystub for that employee that would look like this (with overtime coming into play as well, paying an extra 50% beyond 40 hours): ------------------------------- Id - 1 Name - First M. Last Address - 1234 Main St, City, St, Zip Phone - 1234567890 Email - sample@gmail.com Hours worked - 45 Hourly Rate - $10 Regular Pay, 40 hours at $10/hr - $400 Overtime Pay, 5 hours at $15/hr - $75 Gross Total - $475 ------------------------------ Federal tax (20%) - $95 State Tax (5%) - $23.75 Fica Tax (3%) - $14.25 ------------------------------ Net Check - $342 The program should have one class per .java file all calling to a main.java file using getters and setters. Here are the…Use the ArrayList class Add and remove objects from an ArrayList Protect from index errors when removing Practice with input loop Details: This homework is for you to get practice adding and removing objects from an ArrayList. The Voter class was used to create instances of Voters which held their name and a voter identification number as instance variables, and the number of instances created as a static variable. This was the class diagram: The constructor takes a string, passed to the parameter n, which is the name of the voter and which should be assigned to the name instance variable. Every time a new voter is created, the static variable nVoters should be incremented. Also, every time a new voter is created, a new voterID should be constructed by concatenating the string “HI” with the value of nVoters and the length of the name. For example, if the second voter is named “Clark Kent”, then the voterID should be “HI210” because 2 is the value of nVoters and 10 is the number…