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  • 接口实际应用-工厂代理模式

     1 package cn.demo;
     2 interface Subject{
     3     public void get();
     4 }
     5 class RealSubject implements Subject{
     6     public void get(){
     7         System.out.println("吃饭");
     8     } 
     9 }
    10 class Factory{
    11     public static Subject getInstance(String charName){
    12         if("real".equals(charName)){
    13             return new RealSubject();
    14         }
    15         return null;
    16     }
    17 }
    18 class Proxy implements Subject{
    19     private Subject sub;
    20     public Proxy(){
    21         this.sub = Factory.getInstance("real");
    22     }
    23     public void prepare(){
    24         System.out.println("饭前洗手");
    25     }
    26     public void get(){
    27         this.prepare();
    28         this.sub.get();
    29         this.after();
    30     }
    31     public void after(){
    32         System.out.println("收拾餐桌");
    33     }
    34 }
    35 public class Test{
    36     public static void main(String args[]){
    37         Subject s =new Proxy();
    38         s.get();
    39     }
    40 }

    结果:

    饭前洗手
    吃饭
    收拾餐桌

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  • 原文地址:https://www.cnblogs.com/liyang31/p/5816017.html
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