a) “Inheritance should be used only if the relationship is-a is maintained throughout the lifetime of the objects involved; otherwise, aggregation is the best choice. If a class have an entity reference, it is known as Aggregation. Aggregation represents HAS-A relationship." Describe the HAS-A relationship. By using a scenario, show how it can be implemented. b) Write a Java program that will ask the user to input ten integers in an array. The program will display the digits on screen, will calculate the sum and finally will output the sum on screen.

a) “Inheritance should be used only if the relationship is-a is maintained throughout the lifetime of the objects involved; otherwise, aggregation is the best choice. If a class have an entity reference, it is known as Aggregation. Aggregation represents HAS-A relationship." Describe the HAS-A relationship. By using a scenario, show how it can be implemented. b) Write a Java program that will ask the user to input ten integers in an array. The program will display the digits on screen, will calculate the sum and finally will output the sum on screen.

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

See similar textbooks

Similar questions

Write c# equivalent statements for the following: There is a book library. Define classes respectively for a library. The library must contain a name and a list of books (use array). The books only contain author name as information. In the class, which describes the library, create methods to add a book to the library, to search for a book by a predefined author, and to delete a book from the library. Write a test class, which creates an object of type library, adds several books to it. Implement a test functionality, which finds all books authored by Stephen King and deletes them. Finally, display information for each of the remaining books.
Using the Python language answer the following questions below. Please tell me what program you use if it is IDLE or Atom or a python website please provide the website you use.
Complete the following Programming Assignment. Use good programming style and all the concepts covered to date. Submit the java file(s) electronically through Canvas by the due date via one (1) Zip file. Rainfall Class - Note: Do not write a class as specified regarding the array (below). Instead use two one-dimensional arrays of size 12 each (parallel arrays) and four methods to solve the problem as specified. One array will hold the names of the months and the other array will hold the rainfall in inches for the months. You will pass the appropriate array or arrays to the methods as needed. 1. Rainfall Class Write a RainFall class that stores the total rainfall for each of 12 months into an array of doubles. The program should have methods that return the following: • the total rainfall for the year • the average monthly rainfall • the month with the most rain • the month with the least rain Demonstrate the class in a complete program. Input Validation: Do not accept negative numbers…
Write a java statement to declare an array of 7 objects of the class Product
SOLVE IN "C#" Write c# equivalent statements for the following: There is a book library. Define classes respectively for a library. The library must contain a name and a list of books (use array). The books only contain author name as information. In the class, which describes the library, create methods to add a book to the library, to search for a book by a predefined author, and to delete a book from the library. Write a test class, which creates an object of type library, adds several books to it. Implement a test functionality, which finds all books authored by Stephen King and deletes them. Finally, display information for each of the remaining books.
In java there must be at least two calls to the function with different arguments and the output must clearly show the task being performed. (ONLY ARRAYS or ARRAYLIST) Develop a function that accepts an array and returns true if the array contains any duplicate values or false if none of the values are repeated. Develop a function that returns true if the elements are in decreasing order and false otherwise. A “peak” is a value in an array that is preceded and followed by a strictly lower value. For example, in the array {2, 12, 9, 8, 5, 7, 3, 9} the values 12 and 7 are peaks. Develop a function that returns the number of peaks in an array of integers. Note that the first element does not have a preceding element and the last element is not followed by anything, so neither the first nor last elements can be peaks. Develop a function that finds the starting index of the longest subsequence of values that is strictly increasing. For example, given the array {12, 3, 7, 5, 9, 8,…
In java there must be at least two calls to the function with different arguments and the output must clearly show the task being performed. Develop a function that accepts an array and returns true if the array contains any duplicate values or false if none of the values are repeated. Develop a function that returns true if the elements are in decreasing order and false otherwise. A “peak” is a value in an array that is preceded and followed by a strictly lower value. For example, in the array {2, 12, 9, 8, 5, 7, 3, 9} the values 12 and 7 are peaks. Develop a function that returns the number of peaks in an array of integers. Note that the first element does not have a preceding element and the last element is not followed by anything, so neither the first nor last elements can be peaks. Develop a function that finds the starting index of the longest subsequence of values that is strictly increasing. For example, given the array {12, 3, 7, 5, 9, 8, 1, 4, 6}, the function…
Java Programming Assignment 7.1 Using Java create an interactive (the user should be able to input the values) Java Application to process your utility bill for at-least 6 months. Use Class-Object methodology and use single dimensional arrays in your application. Write detailed comments in your program. You should have a two classes (for example, MontlyBill.java & MontlyBillTest.java). You can also be creative and create your “own problem scenario” and come up with your “solution”.
Can you please help me with this, its in java. Thank you. Write classes in an inheritance hierarchy Implement a polymorphic method Create an ArrayList object Use ArrayList methods For this, please design and write a Java program to keep track of various menu items. Your program will store, display and modify salads, sandwiches and frozen yogurts. Present the user with the following menu options: Actions: 1) Add a salad2) Add a sandwich3) Add a frozen yogurt4) Display an item5) Display all items6) Add a topping to an item9) QuitIf the user does not enter one of these options, then display:Sorry, <NUMBER> is not a valid option.Where <NUMBER> is the user's input. All menu items have the following: Name (String) Price (double) Topping (StringBuilder or StringBuffer of comma separated values) In addition to everything that a menu item has, a main dish (salad or sandwich) also has: Side (String) A salad also has: Dressing (String) A sandwich also has: Bread type…
Please Solve the following Question using C++ Programming Language.
Note: It`s python coding 1. Class Implementationa) Implement a class Rectangle with two attributes, width and height.b) Implement an init method with an optional parameter type. Set the default value of the attributes of width and height to 1.c) Implement a display method to print the values of width and height.d) Instantiate two objects of type rectangle, one with arguments one without. r1 = Rectangle(4, 5) r2 = Rectangle()e) Call display() to print width and height.Example OutputWidth: 4Height: 5Width: 1Height: 1
C++ in visual studio: Implement it completely with copy constructor, overloaded assignment operator and destructor. Then, in main, type an application that creates 2 numbers, sums them, and assigns the result to a new number. for example ; Number 1 (18,32) Number 2 (15.09) - - - - - - - - - - - + Number 3 ( 33,41)