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This article, the first of a two-part series, focuses on the Java TM Media Framework architecture. Part 2 will focus mostly on the code that shows how to register the capture devices, and to play and capture audio and video data. JMF, currently at version 2.1, is Sun\'s initiative to bring time-based media processing to Java. Time-based media is data that changes meaningfully with respect to time, such as audio and video clips.
Updated: 04/29/2005
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One of the most interesting Java development efforts today is the Java TM Media Player, which is part of the Java Media Framework. It can play audio and video files, handle synchronization of different multimedia, and can help you use events to trigger the playing of different types of media. But if you\'re designing Java-based multimedia content, how will you use it? The Java Media Player is a way to handle what JavaSoft staff engineer David Rivas.
Updated: 04/29/2005
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M any applications, from small to enterprise-sized, schedule tasks to run at set times. A task might be a once-a-day data export from the database at 2 A.M., a reminder e-mail sent two hours after some system event, or a periodic check every two minutes to see if a new file has arrived by FTP into a target directory. Although many off-the-shelf products for managing jobs and tasks in your application exist, developers can quickly build their own lightweight customizable component for.
Updated: 04/29/2005
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December 2002 Issue I \'ve talked before about application performance and performance testing, with the goal of providing tools and techniques for improving the user experience with distributed applications using JavaServer Pages (JSP). Performance testing provides confidence that applications will meet users\' perceptions for efficient interactions. Similarly, load testing ensures that applications continue to meet users' perceptions as the number of users increases load testing also.
Updated: 04/29/2005
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Reprinted from JavaWorld July 1999 Wireless networks are mainly used for voice communication. Wireless operators, however, are interested in delivering data over wireless networks. Having become a new buzzword, WAP (Wireless Application Protocol) is designed specifically for delivering Internet data over wireless networks. This article introduces you to WAP and its related technologies (WML, WMLScript, and so forth), and shows you how to develop wireless applications.
Updated: 04/29/2005
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Not so many years ago, computers were huge boxes requiring tremendous quantities of air conditioning and protection. They were hidden away within special rooms located within large corporations and research centers. There weren\'t very many of them, and each had many users. CPU time was extremely expensive, and access and availability were often quite limited. Oh, how the world has changed.
Updated: 04/29/2005
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Java Management Extensions (JMX) technology provides the tools for building distributed, Web-based, modular and dynamic solutions for managing and monitoring devices, applications, and service-driven networks. By design, this standard is suitable for adapting legacy systems, implementing new management and monitoring solutions, and plugging into those of the future.
Updated: 03/24/2005
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Since Java code can originate from anywhere in the network, code-centric security is very important for Java development. Whereas Part 1 of this series dealt with network security concepts in general, Part 2 will examine the challenges associated with running Java code securely over the network. The design and evolution of Java platform security and different Java security APIs will be discussed in future installments, as will the security features in Java 2 Platform, Enterprise Edition (J2EE), fast becoming the dot-com platform of choice. (3,800 words)
Updated: 03/24/2005
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The goal for the JDK is to enable browsers to run untrusted applets in a trusted environment. Our approach is to be conservative at first, and to add functionality when it can be added securely. The intent is to prevent applets from inspecting or changing files on the client file system. Also, the intent is to prevent applets from using network connections to circumvent file protections or people's expectations of privacy.
JDK 1.1 provides the basic technology for loading and authenticating signed classes. This enables browsers to run trusted applets in a trusted environment. This does not make obselete the need to run untrusted applets in a secure way. In the release following JDK 1.1, we will provide tools for finer-grained control of flexible security policies
Updated: 03/24/2005
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Hypertext Transfer Protocol (HTTP) is a stateless search, retrieve and manipulation protocol with the lightness and speed necessary for a distributed collaborative hypermedia information system. Although it may be used for distributed object- oriented systems, HTTP is not powerfull enough to provide the needs of real intergalactic protocols. Instead, the new technologies like RMI and COBRA/IIOP replacing its place. Although RMI attracts the Java programmers in the new distributed computing world, it lacks some crucial services provided by IIOP, which is entirely constructed for the needs of future after long time efforts.
Updated: 03/24/2005
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