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咖啡机，可投币，可退币，可加糖，加水，加咖啡，然后出来浓咖啡，淡咖啡等。(Coffee machine, coin, currency retreat can sugar, add water, add coffee, then out espresso, light coffee.)

idea中使用的idea-vim插件离线包(the zip for idea-vim)

说明：  飞机大战 首先对这个游戏分析,在屏幕上的物体都是飞行物,我们可以把建一个类,让其他飞行物继承这个类.游戏中应有英雄机(也就是自己控制的飞机)、敌人。而敌人应该分为打死给分的飞机（就是普通飞机），另一种就是打死有奖励的敌人。他们都应该是飞行物的子类，我们也可以为普通飞机和给奖励的敌人设一个接口让他们去实现接口，这样有利于以后的扩展，我在这里给的简化版的飞机大战，主要是为了让大家了解面向对象。(First of all, analyze the game. The objects on the screen are flying objects. We can build a class and let other flying objects inherit this class. There should be hero planes (i.e., planes controlled by ourselves) and enemies in the game. And the enemy should be divided into killing the aircraft (that is, ordinary aircraft), the other is to kill the enemy with reward. They should be subclasses of flying objects. We can also set an interface for ordinary aircraft and reward enemies to implement the interface, which is conducive to future expansion. The simplified version of aircraft War I gave here is mainly to let you understand object-oriented.)

png 处理程序 png 算法 可以将一个图片转成png格式的 非常好用(png the handler png algorithm can be an image converted to png format is very easy to use)

ATM 功能1.使用该提款机必须先注册 功能2 使用注册的用户名和密码登录使用本系统（校验） 以下三个功能用接口实现功能3 存钱功能4 取钱功能5 查询余额每次存 钱数+ 每次取钱 钱数-，余额>03、4、5——switch 校验 (ATM function 1 must first register to use the cash machines function 2 uses the registered user name and password to use the system (check) the following three functions with interface functionality 3 4 get money saving features functions balance each deposit 5 queries of money+ time withdrawals of money- the balance> 0 3,4,5- switch check)

使用shiro框架进行权限设置，该框架提供权限、安全、过滤等功能(Use Shiro framework to set permissions, which provides permissions, security, filtering and other functions)

说明：  birch算法是聚类算法的一种，克服了k-means算法的缺点，这里提供了详细的讲解ppt和代码(The birch algorithm is a kind of clustering algorithm, which overcomes the shortcomings of the k-means algorithm. Here is a detailed explanation of ppt and code.)

Property Permission extends Basic Permission Source Code for Andriod.

花旗的面试，有面试题目（其中包含英文面试题目）、笔试、因为包含了个CoreJava的面试题目，所以就选择了Java类了(Citigroup interview, interview questions (which contains the English interview questions), written, because contains a CoreJava the interview questions, so we chose Java class)

java 学习，第一个程序 hello world(Java learning, the first program Hello World)