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The job of Sun's security team is to ensure that users of Java applications will be able to print, read, and write to their local machines without the worry of downloading troublesome viruses, a dream that users of DOS, Windows, and NT have never achieved. It's a hard job, but Li Gong is proud of the way that Java has changed the way people look at security issues.
Updated: 05/18/2005
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Most applications use text in one form or another, and the Java Development Kit (JDK) 1.2 APIs provide a wide range of classes and packages to display, edit, internationalize, and otherwise handle text in applications. The APIs encompass everything from simple text string and character handling, to foreign language support and stylized graphical text. You might not design anything as elaborate as this illuminated manuscript from Renaissance France (follow the link to see others), but the JDK 1.2 APIs, especially Java 2D, provide what you would need to do something similar. This page presents an overview of JDK 1.2 text classes and packages, and links to tutorials where you can learn more.
Updated: 05/18/2005
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One of the nice things about programming in Java is that the language and its class library are designed to provide practical solutions to real object-oriented programming problems. In the object programming community, many of these solutions have been well documented as design patterns; each pattern is a generic solution to a common problem. One such pattern is known as the Observer pattern, which is a solution to the updating problem that arises when some objects have a dependency relationship with others. Java provides a ready-made implementation for this pattern through the Observable class and the Observer interface.
Updated: 05/18/2005
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Persistent data is at the heart of most enterprise applications, and Java provides a cavalcade of methods for retrieving and storing that data. The method you choose to access data depends on a variety of factors. Is the data shared between multiple applications or used by a single program? Does the data exist and is it stored in a database, or will it be generated by the application and stored according to its requirements? Is the data a persistent store of program state or is it a queryable conglomeration of information? What are the expected read, update, insert, and remove operation frequencies? What is the volume of data?
Updated: 05/18/2005
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This rich, simple standard extension API gives enterprises what they need to develop topnotch Java Web services by Sameer Tyagi October 2002 Issue T he Java XML (JAX) Pack provides the core set of APIs that facilitate the building of Web services in Java. The JAX Pack is a set of Java APIs that includes the Java APIs for XML Processing (JAXP) and Messaging (JAXM), the Java API for XML-based RPC (JAX-RPC), SOAP with Attachments API for Java (SAAJ) and Java API for XML Registries (JAXR).
Updated: 05/18/2005
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The process of developing a Java application and making it available on a Symbian platform device differs greatly from the processes used on the familiar desktop environments. In this section we will look at this process, using the example application. The process of developing an application for the Symbian platform has three main steps: developing the Java code and supporting files, sound graphics etc. which culminates in testing on the emulator, creating the files to deploy the application to the Symbian interface using AIF Builder so it has an icon and can be run from native interface, and packaging all the application elements in a release file.
Updated: 05/18/2005
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This article revisits the topic one more time, briefly defining what it means for a programming language to support enums and reviewing the strengths and weaknesses of two alternative approaches for Java. It then presents a mini-language for defining enums compactly. A small compiler that translates this mini-language into Java source code is provided as a resource accompanying this article.
Updated: 05/18/2005
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This article is intended for developers who want to learn more about the Java API for XML Messaging (JAXM) client programming model before delving into the JAXM specification. There's a quick review of XML messaging concepts to illustrate how they relate to the overall JAXM model, but most of the article concentrates on the client view and the two types of JAXM clients that you can implement. I describe differences between the two clients, weigh their advantages and disadvantages, and then summarize the implementation details.
Updated: 05/18/2005
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Jakarta Ant has become a widely accepted standard for Java project build automation. It is not only a tool, but also a very powerful language that allows you to describe complex build and deployment scenarios. At the same time, it is not a scripting language, but a process-oriented language. The convenient thing about Ant is that it's XML-based, so you can easily generate and edit its build files with lots of tools. And finally, Ant is also an open platform and a framework allowing you to plug in new functionality. All of these things make Ant more than suitable for the role of a general purpose automation tool.
Updated: 05/18/2005
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Here's some code that EarthWeb's Alex Chaffee likes to use as an example of how Java can be used to simplify algorithms by combining graphics with threading to render complex graphics. Basically there are three threads: a Renderer, which performs a complex calculation; an Animator, which wakes up periodically and draws the current image to the screen; and of course the default User Interface thread, which responds to user events and changes the display as appropriate.
Updated: 05/18/2005
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