public interface Colorable {
void setColor(int color);
int getColor();
}
public interface Paintable extends Colorable {
int MATTE = 0, GLOSSY = 1;
void setFinish(int finish);
int getFinish();
}
class Point { int x, y; }
class ColoredPoint extends Point implements Colorable {
int color;
public void setColor(int color) { this.color = color; }
public int getColor() { return color; }
}
class PaintedPoint extends ColoredPoint implements Paintable
{
int finish;
public void setFinish(int finish) {
this.finish = finish;
}
public int getFinish() { return finish; }
}