What is the superclass and what is the subclass in the following line? public class Pet extends Dog
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What is the superclass and what is the subclass in the following line? public class Pet extends Dog
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- Assignment: Write the class XXXX_Worker with constructors, accessors, mutuators, and a toString method. A Worker has a Worker Name and Number. Write the class XXXX_ProductionWorker which is a subclass of Worker. The production worker has a shift number (values: 1 or 2) and an Hourly pay rate. A shift number of 1 means the day shift and 2 means the night shift. Write the class XXXX_ShiftSupervisor which is a subclass of Worker. The shift supervisor is a salaried worker who supervises a shift. The shift supervisor has a yearly bonus field. The yearly bonus is earned at year end based on performance. Write a class, XXXX_TestWorker, which does the following: Creates one Shift Supervisor object from information entered by the user. Creates an Array of Production Workers that can hold 3 objects. Itcreates3ProductionWorkerobjectsfrominformationenteredbytheuser Prints the information about each object in the format shown below using the toString methods of the…Identify the constructor for the following class class Teacher { int id; String name; } a. Teacher0 b. class) c. id() d. name()Premise: Class B is a subclass of Class A. Class C is a subclass of Class B. Is the following code valid? B b = new B(); C c = new C(); A a = b; b = c; Valid Invalid
- True or False a. If you do not write a constructor for a class, java will supply a default constructor. b. Java does not allow constructors to be overloaded. Abstract methods must have a void return type. d. All classes have a default equals (Object) method even if their programmer didn't write one for it. You can override a static method defined in a superclass. A method can have at most one return statement. g. A method cannot return a Wrapper class reference. h. The reserved word super can be used to access a constructor in a parent class. i. Object is an abstract class. e. f.3. Person and Customer Classes The Person and Customer Classes Write a class named Person with data attributes for a person’s name, address, and telephone number. Next, write a class named Customer that is a subclass of the Person class. The Customer class should have a data attribute for a customer number, and a Boolean data attribute indicating whether the customer wishes to be on a mailing list. Demonstrate an instance of the Customer class in a simple program.Answer with True or False for the following. Explain your answers.-It is legal to write a method in a class which overloads another method declared in the same.-It is legal to write a method in a superclass which overrides a method declared in a sub-class.
- Design a new Triangle class that extends the abstract GeometricObject class: Draw the UML diagram for the classes Triangle and GeometricObject Implement the Triangle class Write a test program that prompts the user to enter three sides of the triangle, a color, and a Boolean value to indicate whether the triangle is filled: The program should create a Triangle object with these sides and set the color and filled properties using the input The program should display the area, perimeter, color, and true or false to indicate whether it is filled or notConsider the following class: public class theClass { private double value; private string str; public static int count; public theClass () { } public theClass (double d, int, x, String s) { } public void print() { } public static void incrementCount() { } } a) How many members do class theClass have? b) Compare the purpose of the two constructors. c) Use the reference this to write the definition of a method print( )to output the value of the instance data members separated by commas. d) Write a statement to create an object myClass of the class theClass and initialise the instance variables to 5, 10.75 and the string Class. e) Write a definition (heading) for a copy constructor for the class.In-class Assignment Day 8 You should draw the hierarchy for your classes to understand how the coding should be structured. Be sure to notate any classes that are abstract. Write an abstract class for Shape. The intended subclasses are Polygon, Circle, Triangle, and Rectangle. All of these will have a name, an area, and a perimeter. (Consider which methods might be abstract.) Add a toString method that will return the information about the Shape, for example: Triangle, Area: 7.5, Perimeter: 12.0 Write the class Rectangle. A Rectangle is a Shape and should have a width and a height. When a Rectangle is outputted, it should read: Rectangle, Length: #, Width: #, Area: #, Perimeter: # Write the class for Circle. Every circle is a Shape that has a radius. Be sure to provide an accessor method (getter) for the radius. When a circle is outputted, it should read: Circle, Radius: #, Area: #, Circumference: # Write a TestShape class that has the main method, which creates…
- An instance of an abstract class is made by using the keyword 'new'. true or falseIf Class A inherits from Class B, we say that Class B is the subclass and Class A is the superclass. True FalseWhat is the order of Destructors call when the object of derived class child is declared, provided class child is derived from class parent? Select one: a.Destructor of parent only b.Destructor of child followed by parent c.Destructor of parent followed by child d.Destructor of child only