学生选课系统(源码+数据库+设计文档)

3.设计一个能够描述点（point）、线(line)、圆（circle）、矩形（rectangle）和三角形（triangle）等几何形状的类体系，能够计算不同形状的周长和面积（如果能够定义的话）。程序文件命名为Exe3_3.java。(3. Design a point can be described (point), line (line), circle (circle), class hierarchy rectangle (rectangle) and the triangle (triangle) and other geometric shapes, different shapes can calculate perimeter and area (if you can define if). Program file named Exe3_3.java.)

Transaction Service extends Service implements Observer Source Code for Andriod.

javaapplet 的各种应用，字体颜色效果还有图片音频的播放等等，非常有用(javaapplet various applications, font color effects also play audio, pictures, etc., very useful)

二分图最大匹配算法JAVA实现,使用匈牙利算法,eclipse环境(Hungary Algorithm)

geoserver 中国地图矢量图,geoserver 中国地图矢量图(Geoserver Chinese map vector diagram,Geoserver Chinese map vector diagram)

说明：  《Java数据结构和算法》(第2版)介绍了计算机编程中使用的数据结构和算法，对于在计算机应用中如何操作和管理数据以取得最优性能提供了深入浅出的讲解。全书共分为15章，分别讲述了基本概念、数组、简单排序、堆和队列、链表、递归、进阶排序、二叉树、红黑树、哈希表及图形等知识。(&quot Java data structures and algorithms&quot (2) describes computer programming, data structures and algorithms for applications in the computer how to operate and manage data to achieve optimal performance provides simple terms. The book is divided into 15 chapters, describes the basic concepts, arrays, simple sort, heap and queue, linked lists, recursion, advanced sort, binary tree, red-black tree, hash table and graphics knowledge.)

有关数据库，我认为数据库很重要，要认真学，我上传的是我们老师给我们的东西，你们看看对你们有用吗？(The database, I think the database is very important to carefully study, I uploaded is our teacher gave us something, you look to you useful?)

说明：  剑指offer电子版，用例使用java语言编写，供java学习者参考(Sword refers to the electronic version of the offer, the use case is written in java language, for the reference of java learners)

医院管理系统hospital management system(hospital management system)

这是一个将数据库数据转换成sparql查询的工具，很强大！(This is a tool to convert the data into a query sparql, very powerful!)