Deeper Class Design - the Square ClassIn this section, your job will be to write a new class that will adhere to the methods and data outlined in the “members” section below (said another way, your classes will implement a specific set of functions (called an interface) that we’ll describe contractually, ahead of time). These classes will all be shapes, with actions (methods) that are appropriate to shape objects, such as “getArea()”, or “draw()”. First we build a Square class that contains the following data and methods listed below, and then later, we will copy it to quickly make a Circle class.Note: when considering each data item below, think about what type of data would best represent the concept we’re trying to model in our software. For example, all shapes will have a coordinate pair indicating their location in a Cartesian coordinate system. This x and y pair may be modeled as ints or floats, and you might choose between the two depending on what the client application will do (i.e., how it would use these shapes and at what precision).Data Members (the state of our object; these are private class-level variables):Define an x position variable.What’s a good primitive type for this?Define y position variable.Make this private and the same type used for x.Define a variable to represent the sideLength amount.Use a double for this.Add a String to represent this shape for console output (for now, just “[ ]” ).A Color (optional) (use java.awt.Color)Public methods (the object’s actions; often called its interface):A Square constructor that takes no argumentspublic Square() {A Square constructor that takes an initial x,y pairpublic Square(int nx, ...) {Note that we’re overloading this constructor.A Square constructor that takes an x,y pair and a starting side length.Another overloaded constructor.Build a draw() method that outputs to the console the characters used to represent this shape (“[]”)public void draw() {Next, let’s build our accessor methods:int getX()This returns the value stored in x.int getY()Accessor method that returns the value of y.double getSideLength()Another accessor method for getting the value of the Square’s side lengthdouble getArea()returns the calculated area for this SquareNow, our mutator methods:void setX(int nX) { //changes x to nXvoid setY(int nY) { //changes y to nYvoid setSideLength(double sl) { //change sidelength’s value to slBuild a reporting method called toString() that returns the characters associated with that shape.@Overridepublic String toString() { //sample : “[]”Build an equals function to determine if two Squares are the samepublic boolean equals(Square that) {Returns true if the x,y pairs match & the sideLengths match.(hint: this.x == that.x && ...)

Answered: Deeper Class Design - the Square Class…

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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Deeper Class Design - the Square Class

In this section, your job will be to write a new class that will adhere to the methods and data outlined in the “members” section below (said another way, your classes will implement a specific set of functions (called an interface) that we’ll describe contractually, ahead of time). These classes will all be shapes, with actions (methods) that are appropriate to shape objects, such as “getArea()”, or “draw()”. First we build a Square class that contains the following data and methods listed below, and then later, we will copy it to quickly make a Circle class.

Note: when considering each data item below, think about what type of data would best represent the concept we’re trying to model in our software. For example, all shapes will have a coordinate pair indicating their location in a Cartesian coordinate system. This x and y pair may be modeled as ints or floats, and you might choose between the two depending on what the client application will do (i.e., how it would use these shapes and at what precision).

Data Members (the state of our object; these are private class-level variables):

Define an x position variable.
- What’s a good primitive type for this?
Define y position variable.
- Make this private and the same type used for x.
Define a variable to represent the sideLength amount.
- Use a double for this.
Add a String to represent this shape for console output (for now, just “[ ]” ).
A Color (optional) (use java.awt.Color)

Public methods (the object’s actions; often called its interface):

A Square constructor that takes no arguments
- public Square() {
A Square constructor that takes an initial x,y pair
- public Square(int nx, ...) {
  - Note that we’re overloading this constructor.
A Square constructor that takes an x,y pair and a starting side length.
- Another overloaded constructor.
Build a draw() method that outputs to the console the characters used to represent this shape (“[]”)
- public void draw() {
Next, let’s build our accessor methods:
- int getX()
  - This returns the value stored in x.
- int getY()
  - Accessor method that returns the value of y.
- double getSideLength()
  - Another accessor method for getting the value of the Square’s side length
- double getArea()
  - returns the calculated area for this Square
Now, our mutator methods:
- void setX(int nX) { //changes x to nX
- void setY(int nY) { //changes y to nY
- void setSideLength(double sl) { //change sidelength’s value to sl
Build a reporting method called toString() that returns the characters associated with that shape.
- @Override
  public String toString() { //sample : “[]”
Build an equals function to determine if two Squares are the same
- public boolean equals(Square that) {
  - Returns true if the x,y pairs match & the sideLengths match.
  - (hint: this.x == that.x && ...)

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