Storage Retrieval

Download Beginning Google Web Toolkit: From Novice to Professional by Bram Smeets PDF

Posted On April 11, 2017 at 6:42 am by / Comments Off on Download Beginning Google Web Toolkit: From Novice to Professional by Bram Smeets PDF

By Bram Smeets

The e-book is easily written yet is now extraordinarily outdated. The booklet used to be written for GWT model 1.5, yet on the time of my buy GWT 1.7 used to be the most recent unencumber. there have been extra alterations than I anticipated. in exactly the 1st 3rd of the e-book i discovered the following:

- applicationCreator.cmd is not any longer a GWT command. it's been changed by way of webAppCreator.cmd

- webAppCreator.cmd creates a distinct listing constitution than the illustrated examples.

- The default program that GWT generates has changed.

- a brand new occasion version used to be brought in GWT 1.6. in particular, Listeners are changed with Handlers. you'll come upon this for the 1st time in bankruptcy three.

- whereas i used to be following the workouts utilizing GWT 1.7, Google published GWT 2.0 which extra obsoleted this variation. The 2.0 unencumber brought a declarative UI with UIBinder. in fact that may not be during this e-book. additionally in 2.0 "Development Mode" changed the "Hosted Mode" that's nice yet will confuse the beginner utilizing this publication as guidance.

The merely means this publication will be valuable is that if you obtain GWT 1.5 to stick to in addition to the examples. i do not be aware of many programmers, amateur or in a different way, that may be content material to benefit a know-how on an outdated unlock with deprecated tools and out of date tooling.

I just like the narratives of the e-book, i love how it flows, and if the authors ever choose to put up a brand new version with GWT 2.0 with an analogous type and accuracy it will most likely earn 5 stars. regrettably the publication is just too many releases old-fashioned (which is just too undesirable contemplating it used to be simply Copyrighted in 2008!)

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Extra resources for Beginning Google Web Toolkit: From Novice to Professional (Beginning: from Novice to Professional)

Example text

In the case of our sample module descriptor, we define an entry point class GWTasks that starts the application. In Listing 2-2, we’ve specified a class named HelloWorld, located in the default source path directory, as the entry point. Listing 2-2. A Sample HelloWorld Entry Point Class public class HelloWorld implements EntryPoint { public void onModuleLoad() { // initialize the application } } Each class defined as an entry point should inherit from the EntryPoint interface provided by GWT. This interface defines one method that the GWTasks class has to implement.

That also holds true for any library code that you include in your application. UI Library So far we’ve looked at the language support provided by GWT and the emulation classes that you can use. It may seem that this is a very limited subset of the “real” Java and that you have to be well aware of this. But in reality, you will get used to it quickly and just take it for granted. In practice, you’ll just start writing Java code and accept that it’s going to run as JavaScript later. So far we’ve looked at constraints on you as a developer when creating GWT applications.

However, the important thing to note is that in contrast to the normal Java compiler, the GWT compiler will compile only the code that’s actually used within your module. This is a good thing, as it avoids having to transfer to the client JavaScript code (or even entire libraries) that’s never used. However, this principle doesn’t allow for runtime loading of classes, as they aren’t compiled to JavaScript. Therefore, all code must somehow be referenced so it can be included at compile time. This fits in with the fact that normal Java reflection is unavailable, as we’ll see in the next section.

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