桥接模式

桥接模式的核心要点：

处理多层继承结构，处理多维度变化的场景，将各个维度设计成独立的继承结构，使各个维度可以独立的扩展在抽象成建立关联

package bridge;
/***
 * 品牌
 * 
 * @author zw
 *
 */
public interface Brand {
	void sale();
}


class Lenvo implements Brand{

	@Override
	public void sale() {
		// TODO Auto-generated method stub
		System.out.println("销售联想电脑");
	}
	
}
class Dell implements Brand{

	@Override
	public void sale() {
		// TODO Auto-generated method stub
		System.out.println("销售戴尔电脑");
	}
	
}

package bridge;
/***
 * 电脑类型的维度
 * @author zw
 *
 */
public class Computer {
	protected Brand brand;

	public Computer(Brand brand) {
		super();
		this.brand = brand;
	}

	
	public void  sale() {
		brand.sale();
	}
}


class Desktop extends Computer{

	public Desktop(Brand brand) {
		super(brand);
		// TODO Auto-generated constructor stub
	}
	@Override
	public void sale() {
		// TODO Auto-generated method stub
		super.sale();
		System.out.println("销售台式机");
	}
	
}

class LapTop extends Computer{

	public LapTop(Brand brand) {
		super(brand);
		// TODO Auto-generated constructor stub
	}
	@Override
	public void sale() {
		// TODO Auto-generated method stub
		super.sale();
		System.out.println("销售笔记本");
	}
	
}

package bridge;

public class Client {
	public static void main(String[] args) {
		//销售联想的笔记本
		Computer c = new LapTop(new Lenvo());
		c.sale();
	}
}