chapter-03

前台实现grid的自动过滤，很好用，可以自己进行拓展。(Front to achieve the automatic filter grid, well used, can themselves expand.)

Text Switcher Test Source Code for Andriod.

DirectByteBuffer extends BaseByteBuffer implements DirectBuffer.

①阅读Java API文档，掌握借助API编程的方法。 ②掌握String类的常用方法 ③掌握Date类以及Calendar类的常用方法； (① read the Java API documentation, to master the method with API programming. ② master the String class to grasp the common method ③ Date and Calendar classes class common method )

说明：  自学ssm，根据课题需要开发的一个小系统，web层(ssm this is module web)

编写一个控制台程序，模拟在ATM机的存款和取款过程，当输入给定的卡号和密码（初始卡号和密码到数据文件里查看）时，系统能登录ATM系统，根据用户的身份不同显示不同的程序界面；取款 　　每次取款金额只能为100的倍数，总额不超过2000元，不允许透支。且取款之后，要记录取款的金额和时间。 存款 　　每次存款金额只能为100的倍数，总额不超过2000元。 修改密码 　　新密码长度不小于6位，不允许出现6位完全相同的情况，只有旧密码正确，新密码符合要求，且两次输入相同的情况下才可以成功修改密码。(Write a console program to simulate the ATM deposits and withdrawals process, when you enter a given number and password (the initial number and password to the data file view), the system can log in ATM systems, according to the user' s identity different display different The program interface withdrawal amount each withdrawal can only be a multiple of 100, the total does not exceed 2,000 yuan, does not allow overdrafts. And withdrawals after the withdrawal of the amount to be recorded and time. Deposit Amount per Deposit only a multiple of 100, totaling no more than 2,000 yuan. Change Password New Password length not less than six, allowed six identical situation, only the old password is correct, the new password meets the requirements, and enter the same case twice before they can successfully change the password.)

ipdatabase 二叉树快速搜索IP地址数据库 数据 数据源采用2015年广告协会制定的IP地址标准数据库，中国互联网广告行业统一采用的标准IP库。 原理 利用二叉树实现IP查询，首先将10进制IPV4地址转化为二进制构建二叉树，利用二叉树搜索进行搜索，查询时间复杂度log2n，比传统IP库n的查询速度高出一个量级。(Ipdatabase Binary Tree Fast Search IP Address Database data The data source is the standard IP address database formulated by the Advertising Association in 2015, and the standard IP database adopted by the Internet advertising industry in China. principle The binary tree is used to realize IP query. Firstly, the 10-bit IPV4 address is converted into binary to construct a binary tree, and the binary tree search is used to search. The query time complexity log2n is one order of magnitude higher than that of traditional IP library n.)

java中包的应用，只要实现包的功能，引用(java in the application package, as long as the function of packet realize, to quote)

说明：  jdbc作业有助于学习java功能里面的jdbc模块1111111(DBC job helps to learn JDBC module 1111111 in Java function)

本系统用java+Mysql技术，实现了一个聊天室系统，可同时允许多人一起在线聊天，互发信息。(The system used java+ Mysql technology, achieve a chat room system, while allowing people to chat online with each other fat information.)