public class DependencyInversion {
    public static void main(String[] args) {
        Person person = new Person();
        person.receive(new Email());
    }
}

class Email {
    public String getInfo() {
        return "电子邮件信息：hello，world";
    }
}

//完成Person接收消息的功能
//方式1分析
//1.简单，比较容易想到
//2.如果我们获取的对象是微信，短信等等，则新增类，同时Person也要增加相应的接收方法
//3.解决思路：引入一个抽象的接口IReceiver，表示接收者，这样Person类与接口IReceiver发生依赖
//因为Email，WeiXin等等属于接收的范围，他们各自实现IReceiver接口就ok，这样我们就符合依赖倒转原则
class Person {
    public void receive(Email email){
        System.out.println(email.getInfo());
    }
}

public class DependencyInversion {
    public static void main(String[] args) {
        //客户端无需改变
        Person person = new Person();
        person.receive(new Email());

        person.receive(new WeiXin());
    }
}

//定义一个接口
interface IReceiver {
    String getInfo();
}

class Email implements IReceiver{
    public String getInfo() {
        return "电子邮件信息：hello，world";
    }
}

class WeiXin implements IReceiver{
    public String getInfo() {
        return "微信消息：hello，ok";
    }
}

class Person {
    public void receive(IReceiver ireceiver){
        System.out.println(ireceiver.getInfo());
    }
}

public class DependencyPass {

    public static void main(String[] args) {
        //方式1： 通过接口传递实现依赖
//        ChangHong changHong = new ChangHong();
//        OpenAndClose openAndClose = new OpenAndClose();
//        openAndClose.open(changHong);

        // 方式2: 通过构造方法依赖传递
//        ChangHong changHong = new ChangHong();
//        OpenAndClose openAndClose = new OpenAndClose(changHong);
//        openAndClose.open();

        // 方式3 , 通过setter方法传递
        ChangHong changHong = new ChangHong();
        OpenAndClose openAndClose = new OpenAndClose();
        openAndClose.setTv(changHong);
        openAndClose.open();

    }

}

// 方式1： 通过接口传递实现依赖
// 开关的接口
// interface IOpenAndClose {
// public void open(ITV tv); //抽象方法,接收接口
// }
//
// interface ITV { //ITV接口
// public void play();
// }
//
// class ChangHong implements ITV {
//
//     @Override
//     public void play() {
//         System.out.println("长虹电视机，打开");
//     }
//
// }

// 实现接口
// class OpenAndClose implements IOpenAndClose{
// public void open(ITV tv){
// tv.play();
// }
// }

// 方式2: 通过构造方法依赖传递
// interface IOpenAndClose {
// public void open(); //抽象方法
// }
// interface ITV { //ITV接口
// public void play();
// }
//
//class ChangHong implements ITV {
//
//    @Override
//    public void play() {
//        System.out.println("长虹电视机，打开");
//    }
//
//}
// class OpenAndClose implements IOpenAndClose{
// public ITV tv;
// public OpenAndClose(ITV tv){
// this.tv = tv;
// }
// public void open(){
// this.tv.play();
// }
// }

// 方式3 , 通过setter方法传递
interface IOpenAndClose {
    public void open(); // 抽象方法

    public void setTv(ITV tv);
}

interface ITV { // ITV接口
    public void play();
}

class ChangHong implements ITV {

    @Override
    public void play() {
        System.out.println("长虹电视机，打开");
    }

}

class OpenAndClose implements IOpenAndClose {
    private ITV tv;

    public void setTv(ITV tv) {
        this.tv = tv;
    }

    public void open() {
        this.tv.play();
    }
}