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随着Internet的迅速发展，网络在线实时交流的需求也日益扩大，如网上会议、网上聊天、远程教学等。本文介绍了网络在线实时交流工具──电子白板的概念、工作原理、功能、具体实现方法及其发展前景，阐述了基于TCP／IP协议基础上，用网络编程语言Java研制开发的“网络实时交互系统──电子白板”的整个设计开发过程及实践经验。
With the rapid development of the Internet, there is an increasing demand for online real-time network communication, such as online meetings, online chatting and distance learning. This paper introduces the concept of online whiteboard, the working principle, the function, the concrete realization method and its development foreground of the online real-time communication tool of the network ─ ─ Whiteboard, elaborating on the basis of TCP / IP protocol, using the network programming language Java developed “real- System ─ ─ Whiteboard ”the entire design and development process and practical experience.