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.

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.

WS-Security offers powerful features for securing Web service applications, and for many applications these features are essential. But these features come at a high cost in terms of performance and message overhead. Dennis Sosnoski continues his Java Web services column series with a look at how using WS-Security or WS-SecureConversation affects Axis2 performance, and he discusses when the simpler (and better performing) alternative of HTTPS-secured connections is a more appropriate choice.

The Metro Web service stack provides a comprehensive solution for accessing and implementing Web services. It's based on the reference implementations of the JAXB 2.x and JAX-WS 2.x Java™ standards, with added components to support WS-* SOAP extension technologies and actual Web service deployment.

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.

The Resource Description Framework (RDF) is the World Wide Web Consortium (W3C) proposed standard for linking and expressing data on the Web. Java™ developers who develop applications for the Semantic Web will need to convert RDF properties to or from Java types. Jenabean uses the Jena Semantic Web framework's flexible RDF/OWL API to persist JavaBeans, making the task of writing these applications easier and more familiar to Java developers.

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.

This article presents the following:
* Compile and deploy official sample applications from the Android NDK with Ant build tool and native code compiler ndk-build
* Learn in more detail about ADB, the Android Debug Bridge, to control a development device
* Discover additional tools like AM to manage activities and AAPT to package applications
* Create our first own hybrid multi-language project using Eclipse
* Interface Java to C/C++ through Java Native Interfaces (in short JNI)
By the end of this article, you should know how to start up a new Android native project on your own

The IBM Application Pattern for Java lets you easily move any existing Java application into a cloud-based environment and make it reusable as either a platform or a modifiable template. Find out how this pattern works with IBM's cloud offerings, and get started with step-by-step instructions — including two video demos — for creating, deploying, and monitoring Java virtual applications in a variety of usage scenarios.

Cloud Foundry is an open source PaaS cloud solution from SpringSource, the same organization behind the Spring Roo framework, a rapid application development tool for Java developers. Cloud Foundry allows the deployment of applications written using Spring, Rails, and other modern frameworks. This article explains how to install and use the Cloud Foundry Roo add-on component.