Answered: Activity name: activity_main.xml Java…

Activity name: activity_main.xml Java File: MainActivity.java Write the code needed to initialize binding variable in OnCreate method in MainActivity.java file.

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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The main advantage of the encapsulation is that, it provides abstraction between an object and its clients. Select one: O True OFalse Encapsulation is the process of grouping the attributes and method of an object together in a single data structure known as a class Select one: O True O False A constructor is a member variable that is called automatically when an object is created. Select one: O True O False We cannot declare more than one constructor per class. Select one: O True O False on
A student record has the following:Student nameStudent surnameStudent NumberFinal markFGrade comment Create a StudentRecord class, complete with accessors and mutators (get and set methods) for theinstant variables as well as the toString method for formatting the object.The StudentRecord class must have an abstract method called calculatefinalMarkAn IT student has Test1, Test2 and Test3. The IT student's final mark is calculated as (Test1*0.2 +Test2*0.3 + Test3*0.5). The subminimum for a pass is 40% on Test3. ITStudentRecordAn Accounting student has Test1 and Test2. The Accounting student's final mark is calculated as(Tes1*0.4 + Test2*0.6). The subminimum for a pass is 40% on Test2. AccountingStudentRecordBoth the sub classes must have at least two constructors, one with null argument and one with allpertinent instance variables.PS. The final mark and the grade comment cannot be instance variables.The grade comment can be a pass with distinction if the final mark is 80% or greater.…
The functionality of each file is described below:Class BankAccount This class has two instance variables:namebalanceCreate a constructor that takes two parameters to initialize the instance variables name and balance. The name must not be an empty string. The name also must not include any numbers or symbols. The balance must be zero or more to be used.If the name was an empty string a Value Error will be raised with the message “name cannot be empty”If the name contained numbers or symbols a Value Error will be raised with the message “name cannot include numbers or symbols”If the name was valid, it will be formatted properly and assigned to the instance variable. The valid name consists of alphabetical characters lowercase or upper case, may include space, underscore or hyphen.The name may consist of first, middle and last name.One way to validate the name is using Regular Expressions.Proper name format is the first character uppercase and the rest of the name lowercase character.…
QUESTION 7 Final data/code constructs are only inheritable once. O True O False QUESTION 8 You can include code in an interface by using the keyword
The below form will represent the main form from which the user will navigate to the other forms. Meaning each button should be linked to the appropriate form. E.g. If button Manage Addresses is clicked the form managed addresses should be displayed. The Exit button should successfully terminate the program. Create a void method for each button and name them as follow: LinkToAddresses (), LinkToCustomers (), LinkToDrivers (), LinkToStatus (), and LinkToFreight (). The methods should be called under the appropriate button. For the exit button create a void method named AppExit () this should terminate the program.
HappyTunes is an application for downloading music files. Each time a file is purchased, a transaction record is created that includes the music genre and price paid. The available genres are Classical, Easy Listening, Jazz, Pop, Rock, and Other. Develop an application that accepts input data for each transaction and displays a report that lists each of the music genres, along with a count of the number of downloads in each of the following price categories: Over $10.00 $6.00 through $9.99 $3.00 through $5.99 Under $3.00
StockReader Class • This class will contain the method necessary to read and parse the .csv file of stock information. • This class shall contain a default constructor with no parameters. The constructor should be made private. . This is to prevent the class from being instantiated since the class will only contain static methods. • This class shall contain no data fields. • This class shall have a method called readStockData: . This method shall be a public, static, method. . This method shall return a StockList object once all data has been processed. . This method will take a File object as a parameter. This File object should link to the stock market data in your files folder created previously. . This method must validate that the given File object is a .csv file. If it is not, then this method shall throw an IllegalArgumentException. . This method shall read the File object and process all of the stock data into TeslaStock objects and store each object in a StockList. NOTE: The…
A class object can encapsulate more than one [answer].
Please help with the following: C# .NET change the main class so that the user is the one that as to put the name a driver class that prompts for the person’s data input, instantiates an object of class HealtProfile and displays the patient’s information from that object by calling the DisplayHealthRecord, method. MAIN CLASS---------------------- static void Main(string[] args) { // instance of patient record with each of the 4 parameters taking in a value HeartRates heartRate = new HeartRates("James", "Kill", 1988, 2021); heartRate.DisplayPatientRecord(); // call the method to display The Patient Record } CLASS HeartRATES------------------- class HeartRates { //class attributes private private string _First_Name; private string _Last_Name; private int _Birth_Year; private int _Current_Year; // Constructor which receives private parameters to initialize variables public HeartRates(string First_Name, string Last_Name, int Birth_Year, int Current_Year) { _First_Name = First_Name;…
public class VisitorPackage{// Declare data fields: an int named travelerID, // a String named destination, and // a double named totalCost.// Your code here... // Implement the default contructor.// Set the value of destination to N/A, and choose an // appropriate value for the other data fields,// Your code here... // Implement the overloaded constructor that passes new// values to all data fields.// Your code here... // Implement method getTotalCost to return the totalCost.// Your code here... // Implement method applyDiscount.//// This method applies a discount off of the total cost// of the tour. The way the discount is applied depends// on the kind of visitor.//// Child discount: the unit discount is subtracted ONCE// from the total cost of the tour.// Senior discount: the unit discount is subtracted TWICE// from the total cost of the tour.// Parameters:// - a char to indicate the kind of visitor// ('c' for child, 's' for senior)// - a double that indicates the amount of the…
This should be done with Visual Studio C# console app net core Thanks!
A class has a public static field named name. A program creates three instances of the class. How many copies of the name field exist in memory?