装饰器模式--Java实现

相关问题

    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。

类图实现

具体代码

//Phone.java
package org.example.test010;

public interface Phone {
    public void promote();
}

//SimplePhone.java
package org.example.test010;

public final class SimplePhone implements Phone {

    public SimplePhone() {
        System.out.println("是一部简单手机~");
    }
    @Override
        public void promote() {
        System.out.println("在接收来电时，会发出声音提醒~");
    }
}

//UpGrade.java
package org.example.test010;

public class UpGrade implements Phone {
    private Phone phone;

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

    @Override
        public void promote() {
        phone.promote();
    }
}

//JarPhone.java
package org.example.test010;

public class JarPhone extends UpGrade {
    public JarPhone(Phone phone) {
        super(phone);
        System.out.println("变成一部可震动手机~");
    }

    public void promote() {
        System.out.println("接收来电时，可发出声音，也可震动~");
    }
}

//ComplexPhone.java
package org.example.test010;

public class ComplexPhone extends UpGrade {
    public ComplexPhone(Phone phone) {
        super(phone);
        System.out.println("变成一部更高级的手机~");
    }

    public void promote() {
        System.out.println("接收来电时，可发出声音，可震动，也可灯光闪烁提示~");
    }
}

//Main.java
package org.example.test010;

public class Main {
    public static void main(String[] args) {
        Phone phone;
        phone = new SimplePhone();
        phone.promote();
        System.out.println("-------------------------");
        JarPhone jarPhone = new JarPhone(phone);
        jarPhone.promote();
        System.out.println("-------------------------");
        ComplexPhone complexPhone = new ComplexPhone(phone);
        complexPhone.promote();
    }
}

运行结果