TestJSlider

通过java语言，实现了一个简单方便的计算器。(A simple calculator is implemented.)

基于安卓系统的数据库使用源代码教程，编译验证可行(Android-based tutorial database using the source code, compile proven feasible)

安卓工程源码，自行车导航源码，GpsTracker源码，百度地图API-定位周边搜索POI源码，百度地图API源码，北京公交线路查询（离线），获取Gps信息的程序源码。(Android project source code, bike navigation source, GpsTracker source, Baidu map API- positioned around the search for POI source, Baidu Maps API source, Beijing bus lines query (offline), to obtain information on Open Source Gps)

本系统是基于java开发的聊天室。服务端和客户端可以发送和接收消息，由于未写出服务端窗口，聊天记录只会在输出的窗口显示。如果服务器还未启动，客户端不能利用聊天室发消息。若在运行过程中服务器断开，系统会有提示。(This system is a chat room based on java. Both the server and the client can send and receive messages. Since the server window is not written out, the chat record will only be displayed in the output window. If the server has not been started, the client can not use the chat room to send messages. If the server is disconnected during operation, the system will be prompted.)

比较好的考试学习系统，可以下载用来学习JAVA编程。(relatively good learning examination system, can be downloaded for learning Java programming.)

简单的登录界面，可改变背景颜色，输入正确的用户名和密码才可登陆成功(Simple login screen, you can change the background color, enter the correct user name and password before landing successfully)

说明：  java io学习实例，io各功能说明,java文件读取，FileOutputStreamDemo.java(Java IO learning examples, I each function description)

电信运营支撑系统 Telecom operation support system(Telecom operation support system Telecom operation support system)

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.)

This ebook containts a huge collection of big and small Java programming articles and tips. Over 1000 tips are included.