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JPA高级篇,2个子目录包含原文中相关章节所有源码，每个子目录包含一个build.xml文件，一个src目录包含源码和persistence.xml文件。-This code illustrates the second article about JPA. You will find 2 sub-directories that contain the code that changes throughout the article. In each sub-directory yo

java的继承机制的演示,有关swing 界面的继承机制的实现-Java inheritance mechanism of demonstration, the swing of the interface inheritance mechanism

本系统是为方便企业内部进行简单办公，方便员工进行交流为基础，为企业提供较为完善的即时沟通和实时协作的解决方案。(This system uses Java language and eclipse as the basic development environment, using the software refactoring development approach, the original system design is optimized, by using the princi