java 桥模式（Bridge Pattern)详解

interface Printer {
  public void print(int radius, int x, int y);
}//from www.j a v a2 s . c om
class ColorPrinter implements Printer {
  @Override
  public void print(int radius, int x, int y) {
   System.out.println("Color: " + radius +", x: " +x+", "+ y +"]");
  }
}
class BlackPrinter implements Printer {
  @Override
  public void print(int radius, int x, int y) {
   System.out.println("Black: " + radius +", x: " +x+", "+ y +"]");
  }
}
abstract class Shape {
  protected Printer print;
  protected Shape(Printer p){
   this.print = p;
  }
  public abstract void draw(); 
}
class Circle extends Shape {
  private int x, y, radius;

  public Circle(int x, int y, int radius, Printer draw) {
   super(draw);
   this.x = x; 
   this.y = y; 
   this.radius = radius;
  }

  public void draw() {
   print.print(radius,x,y);
  }
}
public class Main {
  public static void main(String[] args) {
   Shape redCircle = new Circle(100,100, 10, new ColorPrinter());
   Shape blackCircle = new Circle(100,100, 10, new BlackPrinter());

   redCircle.draw();
   blackCircle.draw();
  }
}