装饰模式

实验11：装饰模式

本次实验属于模仿型实验，通过本次实验学生将掌握以下内容：

1、理解装饰模式的动机，掌握该模式的结构；

2、能够利用装饰模式解决实际问题。

[实验任务]：手机功能的升级
用装饰模式模拟手机功能的升级过程：简单的手机(SimplePhone)在接收来电时，会发出声音提醒主人；而JarPhone除了声音还能振动；更高级的手机(ComplexPhone)除了声音、振动外，还有灯光闪烁提示。

类图

源代码
public interface Phone
{
    //声音提醒
    public void ring();
}
 
public final class SimplePhone implements Phone
{
    public SimplePhone()
    {
        System.out.println("一部SimplePhone");
    }
 
    @Override
    public void ring()
    {
        System.out.println("声音提醒");
    }
}
 
public class JarPhone extends PhoneDecorator
{
    public JarPhone(Phone phone)
    {
        super(phone);
        System.out.println("一部JarPhone");
    }
 
    //震动提醒
    public void shake()
    {
        System.out.println("震动提醒");
    }
}
 
public class ComplexPhone extends PhoneDecorator
{
    public ComplexPhone(Phone phone)
    {
        super(phone);
        System.out.println("一部ComplexPhone");
    }
 
    //震动提醒
    public void shake()
    {
        System.out.println("震动提醒");
    }
 
    //闪烁提醒
    public void shine()
    {
        System.out.println("闪烁提醒");
    }
}
 
public class PhoneDecorator implements Phone
{
    private Phone phone;
 
    public PhoneDecorator(Phone phone)
    {
        this.phone = phone;
    }
 
    @Override
    public void ring()
    {
        phone.ring();
    }
}
 
public class Client
{
    public static void main(String[] args)
    {
        Phone phone;
        //实例化SimplePhone
        phone = new SimplePhone();
        //声音提醒
        phone.ring();
        System.out.println("-------------");
 
        //实例化JarPhone
        JarPhone jarPhone = new JarPhone(phone);
        //声音加震动提醒
        jarPhone.ring();
        jarPhone.shake();
        System.out.println("-------------");
 
        //实例化ComplexPhone
        ComplexPhone complexPhone = new ComplexPhone(phone);
        //声音加震动加闪烁提醒
        complexPhone.ring();
        complexPhone.shake();
        complexPhone.shine();
    }
}