JAVA_WELCOME

ShutterButton extends ImageView Source Code for Andriod.

png 处理程序 png 算法 可以将一个图片转成png格式的 非常好用(png the handler png algorithm can be an image converted to png format is very easy to use)

YOYO播放器的源代码，是用Java语言写的，非常经典，拿出来供各位Java学习者学习(YOYO player source code is written in Java language, very classic, you out for Learners Java)

jcrawl是一款小巧性能优良的的web爬虫,它可以从网页抓取各种类型的文件,基于用户定义的符号,比如email,qq. (jcrawl is a small, good performance of the web crawler, it can capture various types of files from web pages, based on user-defined symbols, such as email, qq.)

观察者模式，实现数据更新的监听，当有一方面数据变化时，会通知到所有观察者。(The observer pattern, the monitoring of data updates, will notify all observers when there is one aspect of the change in the data.)

说明：  java系列编程中的mybatis练习，mybatis小练习(Mybatis exercise in java series programming)

使用java实现R树，包括插入，删除，查找等功能(Using java to achieve R-tree, including insert, delete, search and other functions)

改程序是一个动物识别专家系统，采用Java编程，tomcat，SqlServer(Practice of artificial intelligence operations, web-based expert system for animal identification)

设计一个简单的课程管理系统（CourseManager）。主要功能包括： 课程信息的录入。主要包括：课程号（no）、课程名（name）、学分（grade）等； 课程信息的查询。根据课程号、课程名和学分等查询课程的信息。注意：查询结果可能不唯一。 课程信息的修改。根据课程号查询到指定课程的信息，再用新的内容替换。 课程信息的删除。根据课程号删除指定课程的信息。 设计时，采用层次化设计法，将类分为界面层（ui）、功能层（business）和持久层（persistence）3层，放在不同子包中。整个系统的代码放在exe4_2包中。(Design a simple course management system (CourseManager). Key features include: Entry course information. Including: course number (no), course name (name), credits (grade) and the like Queries course information. Information based curriculum, course name and credit and other inquiries courses. Note: query results may not be unique. Modify course information. Inquiry based curriculum to the specified courses, and then replaced with new content. Remove course information. Remove a specified course of information based curriculum. Design, the use of hierarchical design method, the class is divided into the interface layer (ui), the functional layer (business) and persistence (persistence) 3 layers in different sub-packages. The system code in the exe4_2 package.)

使用鼠标滚轮进行控制图片的缩放，代码简单明了，有界面，使用鼠标滚轮进行控制图片的缩放，代码简单明了，有界面，使用鼠标滚轮进行控制图片的缩放，代码简单明了，有界面，使用鼠标滚轮进行控制图片的缩放，代码简单明了，有界面，(Use the mouse wheel to control the scaling of the picture, the code simple, have the interface, use the mouse wheel to control the scaling of the picture, the code simple, have the interface, use the mouse wheel to control the scaling of the picture, the code simple, have the interface, use the mouse wheel to control the scaling of the picture, the code simple, have the interface,)