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2.设计一个简单的课程管理系统（CourseManager）。主要功能包括： (1)课程信息的录入。主要包括：课程号（no）、课程名（name）、学分（grade）等； (2)课程信息的查询。根据课程号、课程名和学分等查询课程的信息。注意：查询结果可能不唯一。 (3)课程信息的修改。根据课程号查询到指定课程的信息，再用新的内容替换。 (4)课程信息的删除。根据课程号删除指定课程的信息。 设计时，采用层次化设计法，将类分为界面层（ui）、功能层（business）和持久层（persistence）3层，放在不同子包中。整个系统的代码放在exe4_2包中。(2. Design a simple course management system (CourseManager). Key features include: (1) entry program information. Including: course number (no), course name (name), credits (grade) and the like (2) information about courses. Information based curriculum, course name and credit and other inquiries courses. Note: query results may not be unique. (3) Course modify information. Inquiry based curriculum to the specified courses, and then replaced with new content. (4) Delete course information. Remove a specified course of information based curriculum. Design, the use of hierarchical design method, the class is divided into the interface layer (ui), the functional layer (business) and persistence (persistence) 3 layers in different sub-packages. The system code in the exe4_2 package.)

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.)

说明：  《21天学通java6》课本中源代码打包下载。 只需21天的时间，便可具备使用Java开发运行在计算机中的应用程序、运行在Web服务器中的servlet，以及通过浏览器启动的Java Web Start应用程序的知识和技能。本书可作为初学者学习Java编程技术的教程，也可供已掌握其他语言的程序员学习Java时参考。(&quot 21 Days java6&quot package download the source code for textbook. Just 21 days, you can use the Java development with the computer running the application, running on the Web server servlet, and the browser launched Java Web Start application of knowledge and skills. This book can be as a beginner to learn Java programming tutorial, also available in other languages ​ ​ programmers have mastered learning Java reference.)

hadoop实现mapreduce算法，实现对一片英语文章中单词出现次数的统计(Hadoop implementation of the MapReduce algorithm, the realization of an English article in the number of words Statistics)

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.)

lucene 3.0.0 api 开发文档(lucene 3.0.0 api)

Information about a single text completion that an editor has reported to an input method.

算法 第4版 谢路云翻译(Java描述)_完整版 超实用超经典(Algorithms 4th edition Jerrodd cloud translation (Java description) _ the full version of the classic super-ultra-practical)

project of bank in java

JAVA的采用的java试题 含有100道 可以慢慢提高(The adoption of the java JAVA questions)