a. Class 'Employee that has the following attributes (name, address, phone). b. Class 'Teacher' that has attributes (ssn, email, title) and one method to print the previous information. c. Class 'course that has attributes (Id, name, code, detail) and one method to print the previous information. d. Make relationship between the class 'Teacher' and 'course' as many teachers teaches many courses. e. Class 'Teacher' inheritance its information from class 'Employee'.

a. Class 'Employee that has the following attributes (name, address, phone). b. Class 'Teacher' that has attributes (ssn, email, title) and one method to print the previous information. c. Class 'course that has attributes (Id, name, code, detail) and one method to print the previous information. d. Make relationship between the class 'Teacher' and 'course' as many teachers teaches many courses. e. Class 'Teacher' inheritance its information from class 'Employee'.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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We wish to implement a system that allows the management of Employees and Students. As a first step. you need to implement the above UML diagrams Notes: . ZOOM . PERSON, EMPLOYEE and STUDENT should be public static constants The no-arg constructor will initialize ID, firstName and lastName to their respective null values. It will set personType to PERSON, and sortorder to LAST_NAME The overloaded constructor will assign each parameter to its respective field. sortorder will also be set to LAST_NAME toString() will output type, ID, firstName and lastName, all tab separated. This is an override method equals() will compare if the current object and the parameter contain the same values. This is an override method compareTo() compares the current object and the parameter. This is an override method. It will be used to sort objects Needs the Comparable interface O Will only compare fields depending on the sortorder. For example, if the sortorder is TYPE, it should then compare the…
Weka program:Several methods are offered in Weka.To. What are they for ?b. What do they assess?vs. Recall the principles of each proposed test method and what the parameters correspond to.d. Build a comparison table of the results obtained with the breast-cancer database for each of the test methods available in weka by varying the parameters.e. Comment on these results.f. How to proceed for a leave-one-out type test with cross-validation? Is this a good test method for this base?
You are to create a solution for a Pharmaceutical company. Entities to be represented are: Drugs, Sales Representatives, Bills and Vouchers. • A Drug is characterized by its name (string), its price (int) and its manufacturer (a manufacturer ===> composition). A Manufacturer is characterized by his name (string) and the list of drugs they sell (array of drugs) => composition. • A Sales Representative (sometimes referred to as rep) is characterized by his/her name(string), the total amount sold (double), his/her salary (int). o Sales Representatives can be of two types (inheritance): Reps with a fixed income and a commission Reps with a commission only A Voucher is characterized by its number (int), a client name (a customer), and the quantity sold of each drug. All reps and vouchers and bills are payable. As such, students need to implement an interface called Payable and implement it in the aforementioned classes. 1. You need then to create GUI interfaces where the user can manage all…
Declaring a variable with only "type" is not sufficient. Every variable is distinguished by its data type and a set of additional characteristics. The question now is how to put this idea to work in order to convey the characteristics of any variable.
To declare a variable, "type" alone is not enough. Every variable is distinguished by its data type and a set of additional characteristics. So how can we make use of this idea, which allows us to describe any variable's properties?
1B. Suppose a class has an instance variable x and a method with a local variable x. i. If x is used in a calculation in the body of the method, which x is being referred to? ii. Suppose you needed to add the local variable x to the instance variable x in the body of the method. How would you do so?
Define the Player and FootballPlayer classes as described by the UML diagrams below. #name: String #rating: double Player> #player (name: String, rating: double) +setName (name:String): void +setRating (rating:double): void +getName(): String +getRating(): double +changeRating (rating: double): void +toString(): String setRating method throws IllegalArgumentException if rating is -goals: int +football Player ( name: String, rating: double, goals: int) +setGoals (goals: int): void +getGoals(): int +compareTo (Footballplayer obj): int +changeRating(rating: double): void +toString(): String negative toString method returns all the value of attributes in this class FootballPlayer > Player implements Comparable > call parent constructor inside its own constructor setGoals method throws IllegalArgumentException if goal is negative while implementing the compareTo method of the interface, compare the goals with goals of another FootballPlayer obj: return 1 if the number of class goals is…
Assume that CSCourse class has been written, which has the below UML Diagram. You are giyen the CourseManager class and are asked to complete the main method. Write a body of the main method only that creates two objects of type CSCourse, so that: the first CSCourse is named "CS210% and has 32 students and an average GPA of 3.1 the second CSCourse is named "CS211" and has 31 students and an average GPA of 3.4 sum the students in two courses using the getNumStudents() method, and print the sum to the screen. C) cSCourse name : String -numStudents: int -averageGPA double +CSCourse(name String, numStu int) +getNumStudents() int +getName(): String +setAverageGPA(AVGPA: double) : void public class CourseManager{ public static void main(String[] args) [ / Your code goes here // Sample output is "Sum of students: 63".
Follow the instructions from your instructor to accomplish the following in-class lab assignment. The Problem to Solve: The user needs a program to interact with employee records. The kinds of interactions are "Add an Employee" (Create record), "Show All Employees" (Read records), "View an Employee" (Read one record), "Update an Employee" (Update or change a record), and "Delete an Employee" (Delete a record). These interactions form the standard data processes in much of business software Create, Read, Update, and Delete, which are known by the acronym CRUD. The user needs to continue working with records until they are ready to tell the program. To do this, the program will present a menu of CRUD options and an option to Quit. The user will choose an option and the program will react accordingly. For this lab, the program will only print out which option the user chose. In later labs, we will add more functionality. Questions: What are the inputs needed to solve this…
Declaring a variable with only "type" is sufficient. The data type and other characteristics of a variable may be used to locate it. The next step is to figure out how to use this framework to describe any variable.
In this assignment, you will do an implementation of the Huffman Code. If you have the Data Structures book for this class, on pages 415-421 is the theory for encoding a String using the Huffman Code. There is also a PDF of these pages on the class website. Your task is to develop a proof of concept of the Huffman Code and demonstrate it by taking a String and encoding it. The Huffman Code requires knowledge of a few data structure concepts discussed in class: Priority Queues Binary Trees Recursion Arrays and/or Linked Lists In your program, you will demonstrate an understanding of all these concepts by developing your own priority queue, node, binary tree, array and/or linked list, and use of recursion to support the Huffman Code encryption algorithm. Read through the theory of the Huffman Code in the text and then write a program that can take a String and encrypt it. For example, given a String “Hello World”, the program should apply the Huffman Code algorithm on that…
Using merely "type" to declare a variable is insufficient. Variables are uniquely identified by their data type and other properties. Now we need to find out how to use this concept to characterise any existing variable.