Java-0604PH

物业管理系统客户端物业管理系统客户端有需要的牵走(Property management system client property management system is pulled by clients in need)

说明：  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.)

说明：  将各种格式的数据转换为json格式的字符串 ajax交互数据时使用(When converting various formats of data into JSON format string Ajax interactive data)

说明：  输入出生月份、日期以及性别，显示对应星座及性格(Enter the month, date and gender of birth to show the corresponding constellation and personality)

时间日期服务器(Date and Time Server)

java软件开发教程，集成了SSH框架，还有一些案例。(software development with Java+SSH)

web 系统开发实例，采用Struts+Hibernate框架编写，初学者学习.(Web system development example, use Struts+ Hibernate framework to write, beginners to learn.)

说明：  编写一个复数类，可以进行复数加法和减法运算。编写一个包含main方法的类（应用程序）测试该复数类。要求该复数类至少包含一个无参的构造方法和一个带参的构造方法；数据成员包括复数的实部和虚部，为double类型；包括两个方法，分别实现复数的加法和减法运算。(Write a complex class, which can add and subtract complex numbers. Write a class (application) containing the main method to test the complex class. The complex class is required to include at least one parametric construction method and one parametric construction method; the data members include the real and imaginary parts of the complex, which are of double type; and two methods are included to realize the addition and subtraction operations of the complex respectively.)

说明：  一个简单的用Android编写的弹出框程序，适合初学者(Android Programming, Android Initial Architecture, Android Developers Necessary)

说明：  java进阶书籍，非常好的英文资料，希望大家共同学习进步(Advanced Java books, very good English materials, I hope you can learn and progress together.)