Start with a Java applet and build a server-based proxy system that uses your browser to access an arbitrary Web service. You'll use JavaScript code to access applet-based information and call a servlet, which retrieves the remote information. Thus, you bypass the same-server restrictions on what an applet can and cannot do.

The Metro Web services stack is based on the reference implementations of the JAXB 2.x and JAX-WS 2.x Java™ standards but also includes support for a full range of WS-* SOAP extension technologies.

A query for persistent Java™ objects is typesafe if a compiler can verify it for syntactic correctness. Version 2.0 of the Java Persistence API (JPA) introduces the Criteria API, which brings the power of typesafe queries to Java applications for the first time and provides a mechanism for constructing queries dynamically at run time. This article describes how to write dynamic, typesafe queries using the Criteria API and the closely associated Metamodel API.

If you're a Java programmer coming to Dojo with little or no experience of JavaScript, chances are you're going to struggle with some of the concepts that enable it to work. The main concerns with Dojo are that — at the time of writing — it is still in its infancy (version 1.0 was only released in February 2008) and the documentation available is still somewhat limited. This article helps you bridge the gap from Java code to Dojo so that you can get up to speed quickly and use the toolkit when developing your applications.

You don't need to debug Java™ applications on just your local desktop. Learn how to spread around your debugging using different connection types that make up remote debugging. This article explains the features and examples that show how to set up remote application debugging. Remote debugging can be useful for application development, such as developing a program for a low-end machine that cannot host the development platform, or debugging programs on dedicated machines like Web servers, whose services cannot be shut down. Other examples include Java applications running with limited memory or CPU power, such as mobile devices, or developers wanting to separate the application and development environments, etc.

As mobile platforms become increasingly sophisticated, the demand for mobile computing will increase. In this "Introduction to the eSWT mobile extension" series, learn about the embedded Standard Widget Toolkit (eSWT). You can use eSWT to develop native-looking Java™ applications for a variety of mobile phones. In this article, learn how to use more of the mobile controls: MobileShell, SortedList, HyperLink, TextExtension, and TaskTip.

The Hamlet framework was developed to extend Java™ servlets and enforce the separation of content from presentation. In this article, you'll find an additional way to provide dynamic content as René Pawlitzek advances the framework further and refines use of the template engine. Hamlets provide an easily used and easily understood framework for developing Web-based applications. The framework not only supports, but also enforces, the complete separation of content and presentation. Its simple and elegant design does not hide the familiar underlying servlet infrastructure. The framework provides a servlet extension called a Hamlet. A Hamlet uses the Simple API for XML (SAX) to read template files containing presentation. (These template files must contain content that can be parsed by SAX, such as strict HTML, XHTML, or XML.) While a template file is being read, the Hamlet uses a small set of callback functions to dynamically add content to those places in the template that are marked with special tags and IDs.

In the second of the Modular Java series, we'll cover static modularity. We'll describe how to create bundles, how to install them into an OSGi engine and how to set up (versioned) dependencies between bundles. In the next episode, we'll look at dynamic modularity and show how bundles can react to other bundles coming and going.

The whole point of a cloud platform like Google App Engine for Java™ is in being able to imagine, build, and deploy professional-quality killer apps that scale — without breaking the bank or driving yourself insane. In this second part of his three-part introduction to Google App Engine for Java, Rick Hightower takes you beyond the ready-made examples of Part 1 with a step-by-step guide to writing and deploying a simple contact-management application using App Engine for Java.

This article gives you a hands-on introduction to developing for and deploying on the Amazon Elastic Compute Cloud (EC2). Learn how EC2 differs from Google App Engine, and leverage an Eclipse plug-in and the concise Groovy language to get a simple Web application up and running quickly on EC2.