class Point {
int x, y;
private Point() { reset(); }
Point(int x, int y) { this.x = x; this.y = y; }
private void reset() { this.x = 0; this.y = 0; }
}
class ColoredPoint extends Point {
int color;
void clear() { reset(); }
}
class Test {
public static void main(String[] args) {
ColoredPoint c = new ColoredPoint(0, 0);c.reset();
}
}