11.6

[实验任务一]：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：

```mermaid
classDiagram
    class Phone {
        <<interface>>
        +receiveCall()
    }
    class SimplePhone {
        +receiveCall()
    }
    class PhoneDecorator {
        <<abstract>>
        #phone: Phone
        +PhoneDecorator(phone: Phone)
        +receiveCall()
    }
    class JarPhone {
        +JarPhone(phone: Phone)
        +receiveCall()
    }
    class ComplexPhone {
        +ComplexPhone(phone: Phone)
        +receiveCall()
    }
    class PhoneTest {
        +main(args: String[])
    }

    Phone <|.. SimplePhone : implements
    Phone <|.. PhoneDecorator : implements
    PhoneDecorator <|-- JarPhone : extends
    PhoneDecorator <|-- ComplexPhone : extends
    PhoneDecorator o-- Phone : has
    PhoneTest ..> Phone : uses
    PhoneTest ..> SimplePhone : uses
    PhoneTest ..> JarPhone : uses
    PhoneTest ..> ComplexPhone : uses
```

package Tutorial11;

public interface Phone {
    void receiveCall();  // 接收来电
}

package Tutorial11;

abstract public class PhoneDecorator implements Phone{
    protected Phone phone;  // 被装饰的手机

    public PhoneDecorator(Phone phone) {
        this.phone = phone;
    }

    @Override
    public void receiveCall() {
        phone.receiveCall();  // 调用被装饰对象的功能
    }
}

package Tutorial11;

public class SimplePhone implements Phone{
    @Override
    public void receiveCall() {
        System.out.println("手机响铃：来电提醒！");
    }
}

package Tutorial11;

public class JarPhone extends PhoneDecorator{
    public JarPhone(Phone phone) {
        super(phone);
    }

    @Override
    public void receiveCall() {
        super.receiveCall();  // 调用父类的功能（响铃）
        System.out.println("手机震动：振动提醒！");
    }
}

package Tutorial11;

public class ComplexPhone extends PhoneDecorator{
    public ComplexPhone(Phone phone) {
        super(phone);
    }

    @Override
    public void receiveCall() {
        super.receiveCall();  // 调用父类的功能（响铃和振动）
        System.out.println("手机闪光：灯光闪烁提醒！");
    }
}

package Tutorial11;

public class PhoneTest {
    public static void main(String[] args) {
        // 创建基础手机（SimplePhone）
        Phone simplePhone = new SimplePhone();
        simplePhone.receiveCall();  // 只有响铃提醒

        System.out.println("---------- 升级为JarPhone ----------");

        // 创建升级后的手机（JarPhone，具有响铃和振动功能）
        Phone jarPhone = new JarPhone(simplePhone);
        jarPhone.receiveCall();  // 响铃 + 振动提醒

        System.out.println("---------- 升级为ComplexPhone ----------");

        // 创建最终版本的手机（ComplexPhone，具有响铃、振动和闪光功能）
        Phone complexPhone = new ComplexPhone(jarPhone);
        complexPhone.receiveCall();  // 响铃 + 振动 + 闪光提醒
    }
}