Simpler 2nd Lesson?

Maybe the 2nd lesson I suggested was a little too ambitious.  So I decided put the following task before that:

class Point{
    int x, y;
    Point(){...}                                // default constructor
    Point(int x, int y){...}                // another constructor
    Point(Point p){...}                     // copy constructor
    float getDistance(Point p){...}
    void draw(Graphics g){..}        //draw a cross, or a circle?

}

class Line{
    Point p1, p2;

    Line(int x1, int y1, int x2, int y2){...}
    float getLength(){...}
    void draw(Graphics g) {...}

}