// Example 86 from page 61 of Java Precisely second edition (The MIT Press 2005)
// Author: Peter Sestoft (sestoft@itu.dk)

import java.awt.Color;
import java.awt.Graphics;

class ColoredPoint extends Point implements Colored {
  Color c;
  ColoredPoint(int x, int y, Color c) { super(x, y); this.c = c; }
  public Color getColor() { return c; }
}

class ColoredDrawablePoint extends ColoredPoint implements ColoredDrawable {
  ColoredDrawablePoint(int x, int y, Color c) { super(x, y, c); }
  public void draw(Graphics g) { g.fillRect(x, y, 1, 1); }    
}

class ColoredRectangle implements ColoredDrawable {
  int x1, x2, y1, y2;   // (x1, y1) upper left, (x2, y2) lower right corner
  Color c;

  ColoredRectangle(int x1, int y1, int x2, int y2, Color c) 
  { this.x1 = x1; this.y1 = y1; this.x2 = x2; this.y2 = y2; this.c = c; }

  public Color getColor() { return c; }

  public void draw(Graphics g) { g.drawRect(x1, y1, x2-x1, y2-y1); }
}