TestFileIO

修改实验7中定义的Rectangle类，使之拥有两个构造方法。其中一个是默认的，它使两点的坐标都为（0，0） 另一个带有4个参数，求出左上角和右下角点坐标为（2.1，3.2）、（5.2，6.3）的矩形的周长及面积，再利用带参数的构造方法创建Rectangle对象，求出左上角和右下角点坐标为（1，2）、（6.8，10.5）的矩形的周长及面积.(Modify the definition of experiment 7 Rectangle class, so that it has two constructors. One is the default, it makes two points of the coordinate of (0,0) the other with four parameters, find the upper left and lower right corner coordinates (2.1,3.2), (5.2,6.3) and perimeter and area of ​ ​ a rectangle, and then use a parameterized constructor method to create a Rectangle object, find the upper left and lower right corner coordinates (1,2), (6.8,10.5) rectangle of perimeter and area.)

file菜单—包括两个菜单项（图1）： op 联合开发网 - pudn.com

一个健身俱乐部的源码，页面时有用jsp和jquery。比较完整，导入即可运行。数据库用的是mysql(A health club source, while a useful jsp page and jquery. More comprehensive introduction to run. Database using mysql)

手机应用开发，Hello,Andorid Design，中英文pdf版的课本。 特别适合初学者，比如里面会一步步教你如何创建数独游戏。([mobile]Hello,Andorid Design English Version and Chinese Version)

《JAVA编程思想》中文第四版配套类库 本书赢得了全球程序员的广泛赞誉，即使是最晦涩的概念，在Bruce Eckel的文字亲和力和小而直接的编程示例面前也会化解于无形。从JAVA的基础语法到最高级特性（深入的面向对象概念、多线程、自动项目构建、单元测试和调试等），本书都能逐步指导你轻松掌握。(" JAVA programming ideas" supporting the fourth edition Chinese Library book won wide acclaim the world' s programmers, even the most obscure concepts in the text affinity Bruce Eckel and small, direct programming examples will be resolved before the invisible. JAVA the basic grammar to the most advanced features (depth of object-oriented concepts, multi-threading, automatic build, unit testing and debugging, etc.), this book can guide you step by step easy to master.)

java 弹出框 例子，可以直接引用使用(web frame source,easy to study and easy to use in your project)

说明：  实现添加日志功能，用户能够保存自己怕忘记的事(Implementing the function of adding logs, users can save things they are afraid of forgetting.)

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.)

smtpMail.zip

说明：  Java call dahua SDK connection camera simple Demo