How to make your code dirty, how to avoid it?

We can run Groovy code from Java code in several ways.

In this article, I have tried to analyze the various causes which may lead to Memory Exception. Once an ‘OutOfMemoryException’ is thrown, how best can it be handled has been discussed in this artilce. OutOfMemoryException is thrown when there is not sufficient available memory to carry out a requested activity. In this article, I have tried to illustrate the different methods by which memory leaks can be handled in Web Applications.

The Eclipse 4 development environment, codenamed "e4", just reached its second milestone. The new milestone includes significant changes to the platform and the XML Windowing Toolkit (XWT) for the GUI. XWT, a new feature in the fourth version of Eclipse, received a lot of attention in this milestone.

Usually Groovy is thought of as a loose, dynamically typed language that is otherwise similar to Java. Given this, it would make sense to write in Groovy when dynamism is needed an write in Java when you need strong typing, etc. to avoid side effects. But a great differentiator for groovy over any other dynamic language running on the JVM is that it also has all of Java's support for Strong typing, Generics, immutable objects and the like. This allows Groovy a tremendous range using dynamism where it makes sense and locking it down where it makes sense to do that.

JPA has standardized the interfaces for persistence frameworks. However how much is standardized regarding the runtime behaviour of frameworks. These small code samples show different uses cases to test with your JPA framworks. Additionally hints on the actual framework behaviour, will help to improve usage.

59 US Senators signed a request this week asking the European Commission to expedite its investigation of the Oracle-Sun deal. The letter was addressed to the EU's head US delegate, Angelos Pangratis. The signatories, led by Senators John Kerry (D) and Orrin Hatch (R), came from both Democratic and Republican parties.

ideone.com is a... pastebin. But a pastebin like no other in the Internet. More accurate expression would be online mini IDE and debugging tool. ideone.com is designed mostly for programmers (but, of course, common plain text can also be uploaded). You can use it to: * share your code (that's obvious - it is a pastebin, isn't it? :)) in a neat way, * run your code on server side in almost 40 programming languages * and do it all with your own input data!

Project Lombok seeks to reduce the (significant) amount of boilerplate in Java code with the use of some clever compile-time annotations. Some debate the wisdom of using annotations like these as a substitute for language features. Here is my review of this interesting new project that is causing quite a stir.

Virtually every developer will use bitmaps at times in their programming. Or if not in their programming, then in a website, blog, or family photos. Yet many of us don't know the trade-offs between a GIF, JPEG, or PNG file – and there are some major differences there. This is a short post on the basics which will be sufficient for most, and a good start for the rest.

Porting great infrastructure to OSGi often means solving complex class loading problems. This article is dedicated to the frameworks that face the hardest issues in this area: those that do dynamic code generation. Incidentally these are also the coolest frameworks: AOP wrappers, ORM mappers, and service proxy generators are just a few examples.

JMS is used to exchange asynchronously messages between programs in Java. Learn here how to get it to work using open source ActiveMQ and see sample cut-and-paste-ready codes of JMS producer and JMS consumer.

The JFXtras team has announced a 0.6 Preview Release that includes support for a JavaFX Menu, Tree, Table, Shelf, and other controls that you need to build large JavaFX applications today. Check out my blog for a full list of features, and have a Happy Thanksgiving for us (because we will be way too busy)!

Joseph McCarthy from IBM Ireland has written a tutorial called "Using Comet for asynchronous user notification of autonomous server thread progression" about how to use polling and Comet (long polling) in Java with the ItsNat Java web framework to asynchronously notify end users by web about what is doing an autonomous thread (not a web thread) doing a long task in parallel. Note: to read this article use MSIE 6 or FireFox disabling styles (View/Page Style/No Style)

Sun's Java SE team recently released the Milestone 5 build of JDK 7. This was expected to be a feature complete release of Java 7 but is some way short of that. InfoQ takes a look at what has been added and some of the major features still missing.

Are there cases where a scripting language is more advisable than using Java for both speed of development and performance? How can you identify them? What are the performance implications?

EGL Community Edition is a free Eclipse-based tool that simplifies the development of rich Web 2.0 style applications. Learn more from Will Smythe, Product manager, how EGL CE dramatically accelerates development of JavaScript and Java-based, rich Internet applications without needing to learn or program the intricacies of Ajax, JavaScript, REST, HTML, or XML.

This post shows how to use session handling in GWT, shows the client and server-side plumbing that is required to get this done nicely...esp. when you are using Spring, GWT-SL, Gilead

A function that we had to write in Java on a project that I worked on recently needed to indicate whether there was a gap in a series of data points or not.

A shameless plug for my book "Spring Enterprise Recipes," from Apress. The book covers all manner of topics including business process management, batch processing, web services, messaging, schedulers, application integration, distributed computing and clustered caching. The book provides a discussion of all these techniques as well as prescriptions for Spring and various other libraries to build real-world, practical solutions. I hope you'll consider it for your next purchase.

A new document from the European Network and Information Security Agency shows the primary risks of cloud computing and a new chart of smartphone requests by OS shows Android is growing significantly in popularity. CA might be getting more popular with a prize offering for developer ideas.