线程底部实现原理 静态代理 小例子婚庆公司

 实现接口类方法HappyMarry

我结婚专注自己的事（结婚）

 婚庆公司做布置

 最后主线程调用

整体代码

public class StaticProxy {

    public static void main(String[] args) {
        WeddingCompany cost = new WeddingCompany(new Myself());
        cost.HappyMarry();//以上两行可写成new WeddingCompany(new Myself())。HappyMarry
    }

}

interface Marry {
    void HappyMarry();
}

//真实角色，我去结婚
class Myself implements Marry {
    @Override
    public void HappyMarry() {
        System.out.println("我要结婚了");
    }
}

//代理角色，帮助我结婚
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 before() {
        System.out.println("结婚之前布置现场");
    }

    private void after() {
        System.out.println("结婚之后收尾款");
    }
}