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Sapphire - develop UI without wiring individual widgets Little has changed in the way Java desktop UI is written since the original Java release. Technologies have changed (AWT, Swing, SWT, etc.), but fundamentals remain the same. The developer must choose which widgets to use, how to lay those widgets out, how to store the data being edited and how to synchronize the model with the UI. Even the best developers fall into traps of having UI components talk directly to other UI components rather than through the model. Inordinate amount of time is spent debugging layout and data-binding issues. Sapphire aims to raise UI writing to a higher level of abstraction. The core premise is that the basic building block of UI should not be a widget (text box, label, button, etc.), but rather a property editor. Unlike a widget, a property editor analyzes metadata associated with a given property, renders the appropriate widgets to edit that property and wires up data binding. Data is synchronized, validation is passed from the model to the UI, content assistance is made available, etc. This fundamentally changes the way developers interact with a UI framework. Instead of writing UI by telling the system how to do something, the developer tells the system what they intend to accomplish. When using Sapphire, the developer says "I want to edit LastName property of the person object". When using widget toolkits like SWT, the developer says "create label, create text box, lay them out like so, configure their settings, setup data binding and so on". By the time the developer is done, it is hard to see the original goal in the code that's produced. This results in UI that is inconsistent, brittle and difficult to maintain.

In this article, we are going to look at how the Activiti BPM engine can be used together with Vaadin. We are going to do this in the form of a case study of a demo application that is available on GitHub. The code is licensed under Apache License 2.0 and can freely be used as a foundation for your own applications. Before continuing, you might want to check out this screencast of the demo application in action (HD quality is recommended):

Direct Web Remoting DWR is a Java library that enables Java on the server and JavaScript in a browser to interact and call each other as simply as possible. DWR is Easy Ajax for Java DWR version 3.0.rc1 is the most recent development release. DWR version 2.0 is the current stable release. Download them now and use DWR in your website in minutes.

Java Topic / Java tutorial An exception is an abnormal condition that arises in a code sequence at run time. An exception is a run-time error. Most of these run-time errors could be prevented by doing proper input validation as shown in 151, but in cases where we can not prevent effectively we can use the exception handling mechanism provided by Java.

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www.avg.com/retail is an official URL of AVG antivirus and along with the activation link which is www.avg.com/activation and for the users of Avg To redeem avg activation code look at the back side of cd or the website www.avg.com/activate at the silver coating the put this on www.avg.com/activation Now he would recommend AVG for digital safety & privacy to his known unknown fan, relatives and followers. AVG business download paid version is doing great work in order to keep their clients safe and secure. Features of AVG tech support phone number team which makes it more reliable than any other company and you can Get in touch with Avg customer service phone number experts to attain the service of experts. There will be four easy and basic steps to install avg with license number to follow and complete properly in order to run avg successfully on your device.

Static Keyword in Java. Static Keyword is used for mainly memory management and this keyword also define static methods and properties. Javatpoint clears you more about static in java.

The static keyword is used in java mainly for memory management. We may apply static keyword with variables, methods, blocks and nested class. The static keyword belongs to the class than instance of the class.

Interview Questions on Java Swing for GUI Programmer.Swing is a difficult technology to learn and for programming GUI in swing you need a bit of expertize which makes demand of Swing developer quite high and same time make interview process for swing developer quite challenging and testing. Adding to it there are not much swing interview questions available on net. This article solve this problem by providing some of the best swing interview questions asked in banks. these questions are practical , genuine and same time challenging.

An interface is a blueprint of a class. It has static constants and abstract methods. The interface is a mechanism to achieve fully abstraction in java. There can be only abstract methods in the interface. It is used to achieve fully abstraction and multiple inheritance in Java. Interface also represents IS-A relationship.

Having the same method in the subclass as declared in the parent class is known as method overriding. In other words, If subclass provides the specific implementation of the method i.e. already provided by its parent class, it is known as Method Overriding.

There is only call by value in java, not call by reference. If we call a method passing a value, it is known as call by value. The changes being done in the called method, is not affected in the calling method.

Writing your own logging framework is the perfect coding crime. If you can convince your manager to put it on the project plan, you are guaranteed to have success. At the end of each day, you will go home feeling happy and satisfied. It will feel like you are doing something creative. You will get the intellectual stimulation without the risk of failure. Even the Sun engineers fell into this trap. Prior to Java 4, we had a perfectly good logging framework in Log4J. However, instead of adopting this into the standard Java distribution, we ended up with java.util.logging. There are lots of Java logging frameworks available, even meta-logging frameworks like SLF4J and Jakarta Commons. These are supposed to abstract the logging frameworks so you can change the implementation without touching your code. http://www.javaspecialists.eu/archive/Issue177.html

Does it all make sense now? Do you know how to solve every problem? Probably not, but when it comes right down to it, using Java EE can be even simpler than using Spring, and take much less time. You just have to find the right guides and the right documentation (which is admittedly a severe sore-spot of Java EE; the documentation is still a work in progress, but is getting much better, save blogs like this one.) You have to turn to a vendor like JBoss, or IBM in order to get the use-case driven documentation you need, and they do have documentation, it's just a matter of finding it. Seam 3 in particular strives to give extensive user-documentation, hopefully making things much simpler to adopt, and easier to extend. The main purpose of this article was not to bash Spring, although I may have taken that tone on occasion just for contrast and a little bit of fun. Both Spring and Java EE are strongly engineered and have strong foundations in practical use, but if you want a clean programming experience right out of the box - use Java EE 6 on JBoss Application Server 6 - JBoss Tools - and Eclipse. I will say, though, that the feeling I've gotten from the Spring forums vs the Java EE forums, is that there are far many more people willing to help you work through Java EE issues, and more available developers of the frameworks themselves to actually help you than there are on the Spring side. The community for Java EE is much larger, and much more supportive (from my personal experience.) In the end, I did get my application migrated successfully, and despite these issues (from which I learned a great deal,) I am still happy with Java EE, and would not go back to Spring! But I do look forward to further enhancements from the JBoss Seam project, which continue to make developing for Java EE simpler and more fun. Don't believe me? Try it out. Find something wrong? Tell me. Want more? Let me know what you want to hear.

This article is about how to setup remote debugging in eclipse which is pretty important for development across operating system.

Java Sound API is one of the media API which is used for sound operations like storing, manipulating, editing sounds. Lets see in this tutorial how to use Java Sound API.

What is serialVersionUID? What is it Used For???

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