Constructors

class Point {

private int x,y;

public Point(int x, int y) {

this.x=x;

this.y=y;

}

public int getX() { return x; }

public int getY() { return y; }

public Point getRel(int x, int y) {

return new Point(x-this.x, y-this.y);

}

public Point getRel(Point p) {

return getRel(p.getX(), p.getY());

}