Point

public class Point{

    //these are instance variables; they are private and unaccessible by others
    private double x;
    private double y;

    //this is a default constructor
    //the job of a constructor is to initialize the private instance variables
    //they do not have a return type
    //constructor body is executed when new object is created with the word new
    public Point(){
        x = 0;
        y = 0;
    }

    public Point(double xValue, double yValue){
        x = xValue;
        y = yValue;
    }

    //these are accessor methods
    //accessor methods provide access to private attributes of a class
    public double getX(){
        return x;
    }

    //these are accessor methods
    //accessor methods provide access to private attributes of a class
    public double getY(){
        return y;
    }

    public double findDistanceFromOrigin(){
        double result = Math.sqrt(x*x + y*y);
        return result;
    }

    public String toString(){
        String s = "(" + x + "," + y + ")";
        return s;
    }

    //when this method is called, it is essentially saying
    //"find the midpoint from me to pt"
    public Point findMidPoint(Point pt){
        double midX = (x + pt.x)/2;
        double midY = (y + pt.y)/2;
        Point midPoint = new Point(midX,midY);
        return midPoint;
    }

    public double findDistanceBetween(Point pt){
        double xDiff = (x - pt.x);
        double yDiff = (y - pt.y);
        double result  = Math.sqrt((xDiff*xDiff) + (yDiff*yDiff));
        return result;
    }

    public double findSlope(Point pt){
        double xDiff = (x - pt.x);
        double yDiff = (y - pt.y);
        double slope = yDiff/xDiff;
        return slope;
    }
}