代碼實現

public interface Brand {
    void sale();
}

class Lenovo implements Brand{

    @Override
    public void sale() {
        System.out.println("銷售聯想電腦");
    }
    
}

class Dell implements Brand{

    @Override
    public void sale() {
        System.out.println("銷售戴爾電腦");
    }
    
}
 

/**
 * 電腦類型的維度
 * @author bzhx
 * 2017年3月13日
 */
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);
    }

    @Override
    public void sale() {
        super.sale();
        System.out.println("銷售臺式機！");
    }
    
}

class Laptop extends Computer{

    public Laptop(Brand brand) {
        super(brand);
        // TODO Auto-generated constructor stub
    }

    @Override
    
 
public void sale() {
        super.sale();
        System.out.println("銷售筆記本！");
    }
    
}

public class Client {
    public static void main(String[] args) {
        //銷售聯想筆記本
        Computer c = new Laptop(new Lenovo());
        c.sale();
    }
}

設計模式之橋接模式 Bridge