Task 3: Constant data can also be declared as a Java interface. Any class that implements such an interface can use the constants declared in it without any qualifications. Redesign the example application with the ConstantDataManager as an interface. Use below class diagram for help. Address save () | <> V Constant DataManager final ACCOUNT_DATA_FILE:String ="ACCOUNT.TXT" final VALID_MIN_LNAME_LEN: int 2 save () final ADDRESS_DATA_FILE:String="ADDRESS.TXT" final VALID_ST_LEN: int =2 final VALID_ZIP_CHARS: String = "0123456789" final DEFAULT_COUNTRY: String="USA" final CC_DATA_FILE:String="CC.TXT" final VALID_CC_CHARS: String = "0123456789" final MASTER: String ="MASTER" final VISA: String ="VISA" final DISCOVER: String ="DISCOVER" ↑ I | <> Credit Card save () <> Account save ()

Task 3: Constant data can also be declared as a Java interface. Any class that implements such an interface can use the constants declared in it without any qualifications. Redesign the example application with the ConstantDataManager as an interface. Use below class diagram for help. Address save () | <> V Constant DataManager final ACCOUNT_DATA_FILE:String ="ACCOUNT.TXT" final VALID_MIN_LNAME_LEN: int 2 save () final ADDRESS_DATA_FILE:String="ADDRESS.TXT" final VALID_ST_LEN: int =2 final VALID_ZIP_CHARS: String = "0123456789" final DEFAULT_COUNTRY: String="USA" final CC_DATA_FILE:String="CC.TXT" final VALID_CC_CHARS: String = "0123456789" final MASTER: String ="MASTER" final VISA: String ="VISA" final DISCOVER: String ="DISCOVER" ↑ I | <> Credit Card save () <> Account save ()

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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This should be done with Visual Studio C# console app net core Thanks!
Python Required information id fname lname company address city ST zip 103 Art Venere 8 W Cerritos Ave #54 Bridgeport NJ 8014 104 Lenna Paprocki Feltz Printing 639 Main St Anchorage AK 99501
Please create a Java class that has the following data attributes and methods: private int count - number of customers in the array private customer Record[] data - array of customerRecord objects public customer List() constructor that should initialize memory for data array and count value public void getCustomerList(String fileName) - reads a file call fileName which is a text file containing lines (records) of customer data. This method fills the data array with the records from the file. The file will not have more than 100 records and will have the following format (where customer Number is an integer, firstName and lastName are Strings, and balance is a float: customerNumber firstName lastName balance public customerRecord getCustomer(int customerNumber) - returns the object corresponding to the customer with customerNumber. If the customer number is not in the array, return null. public void enter CustomerRecord(customerRecord new_record)…
// Declare data fields: a String named customerName, // an int named numItems, and // a double named totalCost.// Your code here... // Implement the default contructor.// Set the value of customerName to "no name"// and use zero 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 buyItem.//// Adds itemCost to the total cost and increments// (adds 1 to) the number of items in the cart.//// Parameter: a double itemCost indicating the cost of the item.public void buyItem(double itemCost){// Your code here... }// Implement method applyCoupon.//// Apply a coupon to the total cost of the cart.// - Normal coupon: the unit discount is subtracted ONCE// from the total cost.// - Bonus coupon: the unit discount is subtracted TWICE// from the total cost.// - HOWEVER, a bonus coupon only applies if the…
个 O codestepbystep.com/problem/view/java/loops/ComputeSumOfDigits?problemsetid=4296 You are working on problem set: HW2- loops (Pause) ComputeSumOfDigits ♡ Language/Type: % Related Links: Java interactive programs cumulative algorithms fencepost while Scanner Write a console program in a class named ComputeSumOfDigits that prompts the user to type an integer and computes the sum of the digits of that integer. You may assume that the user types a non-negative integer. Match the following output format: Type an integer: 827184 Digit sum is 22 JE J @ C % 123 A 2 7 8 9 Class: Write a complete Java class. Need help? Stuck on an exercise? Contact your TA or instructor If something seems wrong with our site, please contact us. Submit t US Oct 13 9:00 A
it says Exercise09_13.java:5: error: class Location is public, should be declared in a file named Location.javapublic class Location {
file operator code 1 // The FileOperator class that includes methods for file input and output 2 // Maham Hameed 3 import java.io.*; 4 public class FileOperator 5 { 6 // instance variables 7 private File m_file; 8 9 // constructor 10 // Do not make any changes to this method! 11 public FileOperator() 12 { 13 String fileName = "employeeData.txt"; 14 m_file = new File(fileName); 15 } 16 17 // This method writes an array of Employees into a physical file. 18 // Each line is in this format: "S-Optimus Prime-Computer Science-$1200" 19 // "S" represents StudentWorker ("F" represents Faculty) 20 public void writeFile(Employee[] employees) 21 { 22 // TODO: implement this method 23 } 24 }
Background Often, data are stored in a very compact but not human-friendly way. Think of how dishes in a menu can be stored in a restaurant database somewhere in the cloud. One way a dish object can be stored is this: { "name": "Margherita", "calories": 800, "price": 18.90, "is_vegetarian": "yes", "spicy_level": 2 } Obviously, this format is not user-readable, so the restaurant's frontend team produced many lines of code to render and display this content in a way that's more understandable to us, the restaurant users. We have a mini-version of the same task coming up. Given a list of similar complex objects (represented by Python dictionaries), display them in a user-friendly way that we'll define in these instructions. What is a "dish"? In this project, one dish item is a dictionary object that is guaranteed to have the following keys: "name": a string that stores the dish's name. "calories": an integer representing the calorie intake for one serving of the dish. "price": a float to…
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