A(n) acts as a factory that creates instance objects.
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![A(n)
acts as a
factory
that creates instance objects.
O instance object
instance attribute
O class object
O class attribute](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ff2ae8840-9559-4eb3-8be2-1e1dc1231af2%2F819dcd3e-f50b-4e12-b584-a385ce48e8d6%2Ftsz1gdc_processed.png&w=3840&q=75)
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- A(n) represents a single instance of a class. O instance object instance attribute O class object O class attributeLibrary Information System Design and Testing Library Item Class Design and TestingDesign a class that holds the Library Item Information, with item name, author, publisher. Write appropriate accessor and mutator methods. Also, write a tester program(Console and GUI Program) that creates three instances/objects of the Library Items class. Extending Library Item Class Library and Book Classes: Extend the Library Item class in (1) with a Book class with data attributes for a book’s title, author, publisher and an additional attributes as number of pages, and a Boolean data attribute indicating whether there is both hard copy as well as eBook version of the book. Demonstrate Book Class in a Tester Program (Console and GUI Program) with an object of Book class.When two or more variables are referencing the same object instance, the variables are called for the said instance. *
- is a construct that defines objects of the same type. A class An object A method A data fieldObjectives: At the end of this activity, you should be able to: define classes implement polymorphism and inheritance instantiate an object array apply Exception to all input validations create a Java application for multiple users Procedure: Create a NetBeans project for this activity. The project name should be as follows: o Client (the main class that contains the main method and the implementation of the main menu) o Credit (the class where attributes and methods are defined) The class names to be created are the following: o Client<your_last_name> Ex. ClientBlancoo Credit<your_last_name> Ex. CreditBlanco All class names must be suffixed with your last name. Note that the object to be instantiated in the main method is an object array.For example: CreditBlanco [ ] cb = new CreditBlanco [100]; Compress the NetBeans project into .rar or .zip format and then upload to the link provided in the LMS. Only NetBeans project compressed in .rar or .zip format will be…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
- Object oriented programming in Java codeOverview: A new bank wants to make a simple application to keep track of all accounts and transactions. it is required to help the bank manager implement the required application. Requirements: After a quick meeting with the bank manager, you got the following information: • tis required to store all bank accounts in one collection and all the transactions happened in another collection. Each account has a unique account number, a holder and balance. There is a specific prefix (common for all accounts) that should be added to the holder's civil id to create the unique account number. In addition, it is not allowed for a holder to have more than one account. Furthermore, only three transactions are allowed on any account: deposit, withdrawal and transfer money to another account. • Each holder has a unique civil ID (national id), a name and other attributes (add at least 2 attributes from your choice). • For each transaction, it is required to store the account(s) affected, amount of…class City(object): county = "Lake" population = 3000000 def -_init__(self, name, state): self.name = name self.state = state def region(self): return "Midwest" a) create an instance of this object, called X, for Chicago, Illinois b) return the population of the instance X c) change the county of the instance X from Lake to Cook d) return the name of the state of the instance X d) call the method region() on the instance X
- In object-oriented programming, an object is A One instance of a class B Another word for a class C A class with static method D A method that accesses a class.#employee.py class Employee: def__init__(self,Emp_name,Emp_id): self.__Emp_name=Emp_name self.__Emp_id=Emp_id defset_Empname(self,Emp_name): self.__Emp_name=Emp_name defset_Empid_number(self,Emp_id): self.__Emp_id=Emp_id defget_Empname(self): returnself.__Emp_name defget_Empid_number(self): returnself.__Emp_id class ProductionWorker(Employee): def__init__(self,Emp_name,Emp_id,Emp_shift, Emp_pay_rate): Employee.__init__(self,Emp_name,Emp_id) self.__Emp_shift=Emp_shift self.__Emp_pay_rate=Emp_pay_rate defset_Empshift_number(self,Emp_shift): self.__Emp_shift=Emp_shift defset_Emppay_rate(self,Emp_pay_rate): self.__Emp_pay_rate=Emp_pay_rate defget_Empshift_number(self): returnself.__Emp_shift defget_Emppay_rate(self): returnself.__Emp_pay_rate def main(): Employee_name='' Employee_id='' Employee_shift=0 Employee_pay=0.0 Employee_name=input('Enter the employee name: ') Employee_id=input('Enter the employee ID number: ') Employee_shift=int(input('Enter the employee shift number: '))…Point out errors in the following codes and correct them publicclass CheckingAccount { // Create attributes account Num, Balance privateint accountNum; // Account Number privatedouble balance; // Account balance // Constructor public void CheckingAccount(int aNum, double balance) { // Call setters to initialize attribute values setAccountNumber (aNum); setBalance; } // Setters public void setAccountNumber(int aNum) { if (accountNum >= 100) { accountNum = aNum; } else {System.out.println("This account number is invalid (Account number must be at least 3 digits)!"); this.accountNum = 100; // assign a default value } } public void setBalance(double aBalance) { // make sure the value is positive if (aBalance > 0) { aBalance = balance; } else { System.out.println("This balance value is invalid (input must be positive)!"); aBalance = 0; // assign a default value } } // Getters publicvoid getAccountNumber() { return accountNum; } public void getBalance() { return balance; }…
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