2006011468_wy_Exp5

说明：  一个应用线程实现指针运动的指针时钟程序。程序应用绘制函数时钟面板，根据线程休眠时间间隔，每隔1000ms进行一次重绘。程序通过获取系统时间函数并加以计算个指针位置，再利用绘制函数将其绘制在面板上，通过设置指针长度及颜色，实现时针、分针、秒针的区分。次外，通过获取窗体大小，设置圆面圆心坐标及半径，可依据窗口大小动态划分圆面大小，并动态绘制刻度点位置。(A pointer clock program that uses threads to implement pointer movement. The program draws the function clock panel and redraws it every 1000ms according to the interval of thread dormancy. The program obtains the system time function and calculates the position of a pointer, then draws it on the panel by drawing function. By setting the length and color of the pointer, it achieves the distinction of clockwise, minute and secondhand. Secondly, by acquiring the size of the form and setting the coordinates and radius of the circle center, the circle size can be dynamically divided according to the size of the window, and the location of the scale points can be dynamically plotted.)

说明：  蓝牙通讯协议demo，已经通过通讯测试，实测可以正常进行蓝牙协议通讯(Bluetooth Communication Protocol Demo)

说明：  一只青蛙一次可以跳上1级台阶，也可以跳上2级。求该青蛙跳上一个n级的台阶总共有多少种跳法。要求：分别用普通方法和递归方法实现(A frog can jump up a step or two at a time. Find out how many jumping methods the frog can use to jump up an n-step. Requirements: Implemented by common method and recursive method respectively)

说明：  SpringBoot 2.2.x 整合其他框架：MyBatis、Dubbo、Swagger2、SpringSecurity、RabbitMQ、RocketMQ、Kafka、Redis、MongoDB、Hazelcast、Apollo等(Springboot 2.2. X integrates other frameworks: mybatis, Dubbo, swagger2, spring security, rabbitmq, rocketmq, Kafka, redis, mongodb, hazelcast, Apollo, etc)

windows这是一个随便选的文档，因为我想下一个东西，但是开会员太贵了(windows This is an optional document, because I want the next thing, but the meeting members are too expensive.)

playframework框架，可供初学者使用(playframework framework)

编程之道 ebook for programming(ebook for programming)

LL(1)文法和预测分析方法 1.文法使用产生式来定义； 2.分别求出文法中每一个非终结符的FIRST集、FOLLOW集和SELECT集； 3.画出预测分析表； 4.判定给定的文法是否是LL(1)文法； 5.给定符号串判定是否是文法中的句子，分析过程用分析表格的方式打印出来。(LL(1) Grammar and Predictive Analysis 1. Grammar is defined by production. 2. Find out the FIRST set, FOLLOW set and SELECT set of each non-terminator in grammar. 3. Draw a forecast analysis table. 4. Determine whether a given grammar is LL(1) grammar; 5. Given a string of symbols to determine whether it is a sentence in grammar, the analysis process is printed out in the form of an analysis table.)

一个Java写的聊天应用程序，它可以处理多个用户在同一时间。它还支持文件传输。 (A chat application written in Java, it can handle multiple users at the same time. It also supports file transfer.)

java软件设计建造模式实例.software design pattern java example of the construction.(software design pattern java example of the construction. software design pattern java example of the construction.)