Why not have a single Collection data type that uses methods for adding items, removing the most recently inserted items, removing the least recently inserted items, removing random items, iterating, returning the number of items in the collection, and performing any other actions we may require? Then we could combine them all into a single class that could be used by many customers.
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Q. Why not have a single Collection data type that uses methods for adding items, removing the most recently inserted items, removing the least recently inserted items, removing random items, iterating, returning the number of items in the collection, and performing any other actions we may require? Then we could combine them all into a single class that could be used by many customers.
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- implement a database about people, they could be made up, but you want to include a sizable number, maybe 10-20. The data that you store for each person must include a name and at least one additional piece of information, such as a birthday. You can assume that the names are unique. The database should enable you to enter, remove, modify, or search this data. You also should be able to save the data in a file for use later. Define a class Person to represent a person and another one to represent the database. A dictionary should be a data member of the database class, with Person objects as search keys for this dictionary. Write a program that tests and demonstrates your database.In an Institute, faculties are planning to conduct activities for students [like workshop, seminar, codeathon …] as well as for Faculties [Training Programs, Faculty Development Programs, …] Define a class for the same with appropriate data members and also inherit to Student and Faculty Subclasses. In main method, if two faculties are planning any event on the same day, display warning message.Let’s analyze the game Tetris. That game had a lot of different pieces of various shapes and sizes. If you were to program this game, you know that you will need to maintain a collection of pieces. There are a number of strategies that could be used in order to maintain these separate blocks as classes. On one hand you could have a single class that stores a 2D array of square locations and each of the 4 rotation orientations of each shape. On the other hand, you could use inheritance to have a parent class that stores the 2D array of pieces, but then have a child class for each piece type that only stores its own 4 orientations. This logic would follow similarly for functionality in terms of movement and rotation logic as well. In the box below, what strategy do you think makes the most sense and why. Is there anything further you would add to this structure to make it even better?
- Now we are going to use the design pattern for collecting objects. We are going to create two classes, a class AmazonOrder that models Amazon orders and a class Item that models items in Amazon orders. An item has a name and a price, and the name is unique. The Item class has a constructor that takes name and price, in that order. The class also has getters and setters for the instance variables. This is the design pattern for managing properties of objects. The setName() method should do nothing if the parameter is the empty string, and the setPrice() method should do nothing if the parameter is not positive. The class also has a toString() method that returns a string representation for the item in the format “Item[Name:iPad,Price:399.99]”. For simplicity, we assume an Amazon order can have at most 5 items, and class AmazonOrder has two instance variables, an array of Item with a length of 5 and an integer numOfItems to keep track of the number of items in the…Consider a scenario of Contacts Database, in which all information of user contacts will be stored. In the given scenario you have to implement your database of contacts using the Generic Arraylist you have created in Task 1. Steps to Follow:Step 1:In first step you have to create Contact class with the following attributes;● First Name● Last Name● Phone Number● Email AddressAdd mutator and accessor methods for all given attributesStep 2:You have to create a menu consisting of the following functionalities;1. Add a new contact2. Display all contacts3. Display specific contact 4. Delete a contact5. QuitYou are to write an Ant class to simulate Langton's Ant. In this simulation, a virtual "ant" moves about a two-dimensional square matrix, whose spaces can be designated white or black, according to the rules below: If the ant is on a white space, it will turn right 90 degrees relative to the directions it is facing, move forward one step, and change the space it left to black. If the ant is on a black space, it will turn left 90 degrees relative to the directions it is facing, move forward one step, and change the space it left to white. When the ant hits the edge of the board and is going to go out of the bounds, wrap the board around so the ant will appear on the other side. The matrix is initially composed of all white spaces. The user will specify the size of the square matrix. The user will also specify the number of steps that the ant will move and the starting location and direction of the ant. After the simulation, the final board with the ant position will be displayed to…
- The Fraction Class – Immutable Classes In this section, we’ll build another Fraction class that is unchangeable once initialized and uses the keyword final for its numerator and denominator. Such a Fraction object will have all of its data declared final, and is our first example of building an immutable class. Once a Fraction object is built, its data items will never change for the lifetime of the object. Another way to view this is that the object is completely read-only. As a result, its data will also be declared public, which is the only example of public data you’ll find in this quarter. If you wish to change a fraction object’s numerator or denominator, the old object must be discarded and a new object created in its place. Again, this object’s data will be immutable, constant, non-variable, unchangeable, non-editable, or read-only. So, to add two fractions, our add function will return a new Fraction object that is the sum of the two previous (unchangeable) fractions we wish…write the code in java. Write the class Student having attributes name (String), age (int) and cgpa (double) and methods to set the values of attributes and to return them. There should be constructors (default, parameterize and copy) to initialize the value of attributes. Write another class name Student Management having array of students and count of students as attribute. There should be method for the following: 1. Add new Student in Array 2. Remove a Student from Array using Name (of Student) 3. Sort the Students in array using Name (ascending order) 4. Sort the Students in array using Age (ascending order) 5. Sort the Students in array using CGPA (ascending order) 6. Reverse the order of the Students in array 7. Display information of all Students in array (from zero index to last index) Write another class named as Main having main method and show activity of above methods. 1. Add 5 Students in array 2. Display all students in array 3. Remove a student by name 4. Show the count…This assignment is supposed to represent a group of students in a course. A group of students in a course will be assigned an assignment and produce a collection of assignment results. The results will be used to figure out grade statistics. The grade they receive for their work on the assignment is entirely dependant on the student's energy level. If the student works on many assignments without sleeping their grade will suffer. You will implement four classes (Assignment, AssignmentResult, Student, and Course), they will depend on each other in the order they are listed. Hint: Work on the methods in the order they are found in the documentation below, implement the getter and setter methods before the more complicated methods. Work on the Assignment class, AssignmentResult class, Student class and Course class in that order. Make sure you don't name your class variables the same name as you class's methods. In other words if you have method named id you cannot have a class…
- For this exercise, we are going to do a variation on our Student class by looking at a StudentTest class. The StudentTest class stores math and ELA test scores for a student. We will then extend this class in the HSStudent class, which will check the math and ELA scores to determine if the student has passed. Combined with service hours, the HSStudent class will also check to see if the student has qualified for graduation. Details for each class are outlined in the starter code for each class. In the StudentTester class, you will prompt the user for test scores and service hours, then use these to create a HSStudent object. After creating the object, print out the results. Please enter the student name: Ryan Please enter the Math Score: 500 Please enter the ELA Score: 600 Please enter the Service Hours: 100 Pass Math? false Pass ELA? true Completed Service Hours? true Ryan has not yet qualified for graduation. import java.util.Scanner; public class StudentTester{public static…This assignment is supposed to represent a group of students in a course. A group of students in a course will be assigned an assignment and produce a collection of assignment results. The results will be used to figure out grade statistics. The grade they receive for their work on the assignment is entirely dependant on the student's energy level. If the student works on many assignments without sleeping their grade will suffer. You will implement four classes (Assignment, AssignmentResult, Student, and Course), they will depend on each other in the order they are listed. Hint: Work on the methods in the order they are found in the documentation below, implement the getter and setter methods before the more complicated methods. Work on the Assignment class, AssignmentResult class, Student class and Course class in that order. Make sure you don't name your class variables the same name as you class's methods. In other words if you have method named id you cannot have a class…This assignment is supposed to represent a group of students in a course. A group of students in a course will be assigned an assignment and produce a collection of assignment results. The results will be used to figure out grade statistics. The grade they receive for their work on the assignment is entirely dependant on the student's energy level. If the student works on many assignments without sleeping their grade will suffer. You will implement four classes (Assignment, AssignmentResult, Student, and Course), they will depend on each other in the order they are listed. Hint: Work on the methods in the order they are found in the documentation below, implement the getter and setter methods before the more complicated methods. Work on the Assignment class, AssignmentResult class, Student class and Course class in that order. Make sure you don't name your class variables the same name as you class's methods. In other words if you have method named id you cannot have a class…