Chapter 8, Problem 16E

Explanation of Solution

Program:

//definition of "Line" class

public class Line

{

    /*create the two objects for the "Point" class*/

    private Point p1;

    private Point p2;

    // definition of constructor

    public Line(Point p1, Point p2)

    {

        /*set the points to the "Point" class object*/

        this.p1 = p1;

        this.p2 = p2;

    }

    // definition of new constructor

    public Line(int x1, int y1, int x2, int y2)

    {

        //set the two points

        p1 = new Point(x1, y1);

        p2 = new Point(x2, y2);

    }

    //definition of "getP1" method

    public Point getP1()

    {

        // returns this line's first endpoint

        return p1;

    }

    //definition of "getP2" method