Which of the following statements is correct about immutable classes? O It depends on the user of the class - if the person alters the content of an object of this class, then it's mutable, otherwise, it's not mutable. OIt means none of the variables of the class (including objects referenced in the class) can be updated outside the class. None of these OThe String class is mutable because you can change the content of a String object.

Which of the following statements is correct about immutable classes? O It depends on the user of the class - if the person alters the content of an object of this class, then it's mutable, otherwise, it's not mutable. OIt means none of the variables of the class (including objects referenced in the class) can be updated outside the class. None of these OThe String class is mutable because you can change the content of a String object.

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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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…
java Assignment Description: Write a class named Car that has the following fields: The yearModel field is an int that holds the car’s year model. The make field references a String object that holds the make of the car. The speed field is an int that holds the car’s current speed. In addition, the class should have the following constructor and other methods. The constructor should accept the car’s year and make as arguments. These values should be assigned to the object’s yearModel and make fields. The constructor should also assign 0 to the speed field. Constructor: The constructor should accept no arguments. Constructor: The constructor should accept the car’s year as argument.Assign the value to the object’s yearModel. No need to assign anything to the make and assign 0 to speed. Appropriate mutator methods should set the values in an object’s yearModel, make, and speed fields. Appropriate accessor methods should get the values stored in an object’s yearModel, make, and…
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-int x //x coord of the center -int y // y coord of the center -int radius -static int count // static variable to keep count of number of circles created + Circle() //default constructor that sets origin to (0,0) and radius to 1 +Circle(int x, int y, int radius) // regular constructor +getX(): int +getY(): int +getRadius(): int +setX(int newX: void +setY(int newY): void +setRadius(int newRadius):void +getArea(): double // returns the area using formula pi*r^2 +getCircumference // returns the circumference using the formula 2*pi*r +toString(): String // return the circle as a string in the form (x,y) : radius +getDistance(Circle other): double // * returns the distance between the center of this circle and the other circle +moveTo(int newX,int newY):void // * move the center of the circle to the new coordinates +intersects(Circle other): bool //* returns true if the center of the other circle lies inside this circle else returns false +resize(double scale):void// * multiply the…
1. A Simple Student Class (Easy Version) by Codechum Admin Implement the class Student. This class should contain 4 properties: firstName a string which represents the first name of the student lastName a string which represents the last name of the student age an integer which represents the age of the student isMinor a boolean value which will be true if the age is less than 18 and false otherwise. this will automatically be set every time an instance of this class is created and will automatically be updated appropriately every time the age of the student increases. This class should have a constructor with the following parameters: public Student(String firstName, String lastName, int age) Additionally, it should have the following methods: 1. getName Returns the name of the student in the following format: "{lastName}, {firstName}" 2. increaseAge Increases the age by one (1). This returns nothing. 3. toString Returns the details of the student in a…
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Objects and Pointers Write code to instantiate/create two Bicycle objects: a default object (my_bike) and a non-default object (sister_bike). For the non-default object you may hard-code (or make up) the required parameters (brand, price and wheel size). No console input is needed.
StringBuilder objects should be used in place of String objects if O is more than 80 characters long. the string may grow. O the string is declared final. O the tring needs to be initialized.
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Convert the pseudocode into Python. 1. Pet ClassDesign a class named Pet, which should have the following fields:■ name: The name field holds the name of a pet.■ type: The type field holds the type of animal that a pet is. Example values are "Dog", "Cat", and "Bird".■ age: The age field holds the pet’s age.2. The Pet class should also have the following methods:■ setName: The setName method stores a value in the name field.■ setType: The setType method stores a value in the type field.■ setAge: The setAge method stores a value in the age field.■ getName: The getName method returns the value of the name field.■ getType: The getType method returns the value of the type field.■ getAge: The getAge method returns the value of the age field.3. Once you have designed the class, design a program that creates an object of the class and prompts the user to enter the name, type, and age of his or her pet. This data should be stored in the object. Use the…
A field has access that is somewhere between public and private. static final Opackage Oprotected