201 notes on Point and Triangle objects

 
// a part of class Point ///////////////////////////
 
// two equivalent ways of computing distance
 
//  syntax for Point objects p1, p2
//  Point.distance(p1, p2);
 
    public static double distance(Point p, Point q) {
 
        double dx = p.x - q.x;
        double dy = p.y - q.y;
 
        dx *= dx;
        dy *= dy;
 
        return Math.sqrt(dx + dy);
    }
 
//  syntax for Point objects p1, p2
//  p1.distance(p2);
 
    public double distance(Point q) {
 
        double dx = this.x - q.x;
        double dy = this.y - q.y;
 
        dx *= dx;
        dy *= dy;
 
        return Math.sqrt(dx + dy);
    }
 

// a part of class Triangle ////////////////////////
 
//  with a constructor rather than set() methods
 
//  syntax for Point objects v1, v2, v3 (vertices)
//    Triangle t = new Triangle(v1, v2, v3);
 
public class Triangle {
 
    private Point a, b, c;
 
    public Triangle(Point aa, Point bb, Point cc) {
        a = aa;
        b = bb;
        c = cc;
    }
 
    
    
    public double perimeter() {
        return 0.0;
 
        // nominal value here
        // to be replaced after interface is written
    }
 
    public double area() {
        return 0.0;
 
        // nominal value here
        // to be replaced after interface is written
    }
}