靜態代理模式

package com.cl.demo01;

//靜態代理模式

public class StaticProxy {
    public static void main(String[] args) {

        WeddingCompany weddingCompany = new WeddingCompany(new You());
        weddingCompany.HappyMarry();
    }

}

interface Marry{

    void HappyMarry();

}

//真實角色
class You implements
 
  Marry{
    @Override
    public void HappyMarry() {
        System.out.println("king king king");
    }
}

//代理角色
class WeddingCompany implements Marry{

    private Marry target;

    public WeddingCompany(Marry target) {
        this.target = target;
    }

    @Override
    public void HappyMarry() {
        before();
        
 
this.target.HappyMarry();
        after();
    }

    private void after() {
        System.out.println("結婚之後，收尾款");
    }

    private void before() {
        System.out.println("結婚之前！");
    }
}

/*
總結：
    1.真實物件和代理物件都要事先同一個介面
    2.代理物件要代理真實角色

好處：
    1.代理物件可以做很多真實物件做不了的事情
    2.真實物件專注做自己的事情
* */
 

編導lambda表示式

package com.cl.lambda;

//編導lambda表示式
public class TestLambda {

    //3.靜態內部類
    static class Like2 implements ILike{
        @Override
        public void lambda() {
            System.out.println("I like lambda2");
        }
    }

    public static void main(String[] args) {
        ILike like = new Like();
        like.lambda();

        like = new Like2();
        like.lambda();

        //4.區域性內部類
        class Like3 implements ILike{
            @Override
            public void lambda() {
                System.out.println("I like lambda3");
            }
        }
        like=new Like3();
        like.lambda();

        //5.匿名內部類
        like=new Like() {
            @Override
            public void lambda() {
                System.out.println("I like lambda4");
            }
        };
        like.lambda();

        //6.用lambda簡化
        like=()->{
            System.out.println("I like lambda5");
        };

        like.lambda();

    }

}

//1.定義一個函式式介面
interface ILike{
    void lambda();
}

//2.實現類
class Like implements ILike{
    @Override
    public void lambda() {
        System.out.println("I like lambda");
    }
}