Chapter 3, Problem 16RE

Explanation of Solution

The given code:

//declaring class

public class Square

{

    //declaring class variables

    private int sideLength;

    private int area;

    //declaration of constructor

    public Square(intinitialLength)

    {

        //initializing class variables

        sideLength = initialLength;

        //calculating area

        area = sideLength * sideLength;

    }

    //defining class method “getArea()”

    public int getArea()

    {

        //return the value of area

        return area;

    }

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Explanation of Solution

Fixing error:

The error can be fixed by making “area” as local variable in the “getArea()” method and removing the area calculation from the constructor.

Code after fixing the error:

//declaring class

public class Square

{

    //declaring class variables

    private int sideLength;

    //declaration of constructor

    public Square(intinitialLength)

    {

        //initializing class variables

        sideLength = initialLength;

    }

    //defining class method “getArea()”

    public int getArea()

    {

        //declare local variable “area”

        private int area;

        //calculating area

        area = sideLength * sideLength;

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