---
layout: post
title:  Java Generic
date:   2016-02-19 13:06:35
categories: clay_created
tags: clay_created
image: /assets/article_images/dawn.JPG
---

> “The Get and Put Principle: use an extends wildcard when you only get values out of a structure, use a super wildcard when you only put values into a structure, and don’t use a wildcard when you both get and put.”
摘录来自: Maurice Naftalin. “Java Generics and Collections”。 iBooks. 
Add new article java generic
Add new article java generic
