设计模式--结构型--桥模式

桥模式：将某个问题抽象的不同形式分别与该问题的具体实现部分相分离，使他们都可以独立变化，并能够动态结合。多用聚合而不是继承，防止子类的爆炸

public interface Drawtool {
	public void draw();
}

package com.brigepattern;

public class Drawtool1 implements Drawtool{

	@Override
	public void draw() {
		// TODO Auto-generated method stub
		System.out.println("这是使用工具1");
	}

}

package com.brigepattern;

public class Drawtool2 implements Drawtool{

	@Override
	public void draw() {
		// TODO Auto-generated method stub
		System.out.println("这是使用工具2");
	}

}

package com.brigepattern;

public interface Shape {
	public void doDraw(Drawtool dt);
}

package com.brigepattern;

public class Square implements Shape{

	public void doDraw(Drawtool dt) {
		// TODO Auto-generated method stub
		dt.draw();
	}

}

package com.brigepattern;

public class Circle implements Shape{

	@Override
	public void doDraw(Drawtool dt) {
		// TODO Auto-generated method stub
		dt.draw();
	}

}

package com.brigepattern;

public class Test {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		
		Shape square = new Square();
		Shape circle = new Circle();
		square.doDraw(new Drawtool1());
		square.doDraw(new Drawtool2());
		circle.doDraw(new Drawtool1());
		circle.doDraw(new Drawtool2());
	}

}