// Example 87 from page 61 of Java Precisely second edition (The MIT Press 2005)
// Author: Peter Sestoft (sestoft@itu.dk)

import java.awt.Canvas;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Frame;
import java.awt.Graphics;

class Example87 {
  static void printcolors(Colored[] cs) {
    for (int i=0; i<cs.length; i++)
      System.out.println(cs[i].getColor().toString());
  } 

  static void draw(Graphics g, ColoredDrawable[] cs) {
    for (int i=0; i<cs.length; i++) { 
      g.setColor(cs[i].getColor()); 
      cs[i].draw(g);
    }
  } 

  public static void main(String[] args) {
    final ColoredDrawable[] cs = 
          { new ColoredDrawablePoint(3, 4, Color.red), 
            new ColoredRectangle(50, 100, 60, 110, Color.green) };
    printcolors(cs);
    Frame f = new Frame();
    // Anonymous local inner class, subclass of java.awt.Canvas
    f.add(new Canvas() {
        static final long serialVersionUID = 50L;
        public void paint(Graphics g) {
          draw(g, cs);
        }
        public Dimension getPreferredSize() { return new Dimension(400, 300); }
      });
    f.pack(); f.setVisible(true);
  }    
}