Accessor method: //definition of "Point" class public class Point { //declare the required variables int x; int y; //definition of "isCollinear" method public boolean isCollinear(Point p1, Point p2) { // check all points have same x or y value if ((x == p1.x && x == p2.x) || (y == p1.y && y == p2.y)) { //return the value return true; } /* declare the variables and calculate the values/ double slope1 = (p1.y - y) / (p1.x - x); double slope2 = (p2.y - y) / (p2.x - x); //return the result return round(slope1, 4) == round(slope2, 4); } //definition of "round" method private double round(double value, int places) { //iterate "i" until it reaches "places" value for (int i = 0; i < places; i++) { //calculate "value" value = 10...

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Chapter 8, Problem 6E

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Accessor method:

//definition of "Point" class

public class Point

{

    //declare the required variables

    int x;

    int y;

    //definition of "isCollinear" method

    public boolean isCollinear(Point p1, Point p2)

    {

        // check all points have same x or y value

if ((x == p1.x && x == p2.x) || (y == p1.y && y == p2.y))

        {

            //return the value

            return true;

        }

/* declare the variables and calculate the values/

        double slope1 = (p1.y - y) / (p1.x - x);

        double slope2 = (p2.y - y) / (p2.x - x);

        //return the result

        return round(slope1, 4) == round(slope2, 4);

    }

    //definition of "round" method

    private double round(double value, int places)

    {

        //iterate "i" until it reaches "places" value

        for (int i = 0; i < places; i++)

        {

            //calculate "value"

            value = 10...

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