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说明：  这是head first design patterns源码，讲解了java23种设计模式(23 design patterns in Java)

java实现控制台五子棋，人以x,y的方式输入，电脑随机下棋。(java realize console backgammon, people with x, y way input, computer random chess.)

手机版画图工具，和电脑自带的画图工具部分功能一致，大家编程时可以多学习

机器学习中Perceptron算法统计词频(The statistics of words of perceptron algorithm in Machine Learning)

Like FileBackupHelper, but takes absolute paths for the files instead of subpaths of getFilesDir() Source Code for Java Script.

要求设计一个SP00LING输出进程和两个请求输出的用户进程，以及一个SP00LING输出服务程序。当请求输出的用户进程希望输出一系列信息时，调用输出服务程序，由输出服务程序将该信息送入输出井。待遇到一个输出结束标志时，表示进程该次的输出文件输出结束。之后，申请一个输出请求块(用来记录请求输出的用户进程的名字、信息在输出井中的位置、要输出信息的长度等)，等待SP00LING进程进行输出。 SP00LING输出进程工作时，根据请求块记录的各进程要输出的信息，将其实际输出到打印机或显示器。这里，SP00LING输出进程与请求输出的用户进程可并发运行。 (Asked to design a user process SP00LING request output and two output processes, and outputs a SP00LING service program. When users want to process requests output output range information, call the output service program, service program by the output information into the output shaft. Treatment to an output end of the flag, which means that the process of the second output file output end. Thereafter, the application of an output request block (name of the user to record the output of the process request, the information on the position of the output well, and length information to be outputted), the process waits SP00LING output. When SP00LING output process work, information requested under each process block records to be output, its actual output to a printer or monitor. Here, the user process and the output process SP00LING request output can be run concurrently.)

形式概念分析，概念格算法 包含两个算法，一个算法是对给定的概念上下文数据集并生成概念格，另一个算法则是绘制出概念格的图。(This demo shows two algorithms related to Formal Concept Analysis. Algorithm one calculates all Formal Concepts contained in a given Formal Context. The second algorithm draws a Formal Concept Lattice corresponding to the given Context. The Lattice is not drawn taking any aesthetic considerations into account. This will be part of future enhancements. The program was written using Java (my first Java experience, a quite complex "Hello World").)

java MD5算法加解密工具类，直接就能够调用(Java MD5 Algorithms Encryption and Decryption Tool Class)

ssh框架实现增删改查以及购物车的实现和分页功能(SSH framework implementation questions and increase the realization of the shopping cart check and paging function)

NETBANKING ONLINE SYSTEM