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ssd3 unit1编程参考答案，经过实践检验 绝对 正确(The answer of ssd3 unit1)

设计一个教材类，一个课程类，及一个为某门课程指定参考教材的类。一门课程可以有多本参考教材，再设计一个测试类。(it a program created form me)

spring boot 工作流，采用spring boot的结构框架实现工作流的机制(Spring boot workflow, using spring boot structure framework to implement workflow mechanism)

说明：  可以将气象数据grib2文件 转为json文件 便于使用与开发(The meteorological data grib2 file can be converted into JSON file for easy use and development)

A thin wrapper around shell s read function showing a file name on error.

Java聊天室系统详细设计,包括程序实现,数据库设计等(The detailed design of Java chat room system)

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.)

java版源代码,里面包含很多源代码,大家可以看看.(java version of the source code, which contains a lot of source code, everyone can see.)

基本算法： 采用博弈比较常用的策略。 计算机下子前，分别对玩家和电脑棋型进行评估，然后根据棋型对每一位置打分（玩家和电脑在同一点的分数不同），比如活三100分，冲四1000分等，然后根据每个落子点分数进行选择。采用极大极小值策略，进行多步计算。(Basic algorithm: The game strategy is commonly used. Before computer playing, players and computer chess models are evaluated separately, and then each position is scored according to the chess pattern (players and computers have different scores at the same point), such as live three hundred points, go four thousand points, and then choose according to the score of each falling point. Multi-step calculation is carried out by using the minimax strategy.)

JAVA的简单增加，删除 修改，更新语句(JAVA simple to add, delete modify, update statement)