java 桥模式(Bridge Pattern)详解

时间:2021-10-02 05:00:36

java 桥模式Bridge Pattern

Bridge模式解耦,其实施的定义。它是一种结构模式。本模式涉及充当桥的接口。这座桥使具体的类独立的接口实施者类。

 Bridge模式解耦,其实施的定义。它是一种结构模式。

本模式涉及充当桥的接口。这座桥使具体的类独立的接口实施者类。

这两种类型的类可以在不影响彼此被改变。

实例:

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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();
  }
}

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