GWT or Google Web Toolkit is an open–source Java Software development framework. It eases writing AJAX apps.
With Google Web Toolkit, one can develop & debug AJAX apps in Java Language with the help of Java development tools of their choice.
How Does GWT Work?
The toolkit contains API libraries and widgets and a plugin for Eclipse and compiler, the development server.
This helps the developers create customized development environments from plugin component built by Eclipse members.
The developers can debug in the browsers and IDEs of their choice.
The compiler does the optimization tasks, like the in-lining method, optimizing strings and removing dead code.
Speed Tracer, a chrome extension aids in diagnosing performance issues.
GWT was announced in the year 2006 by Google at Java One conference. The pronunciation goes as “gwit”.
Even though GWT stands for “Google Web Toolbox”, according to the project documentation, it stands for “GWT Web Toolkit”.
– a recursive acronym like one used for GNU. GWT is available under Apache License 2.0.
Development with Google Web Toolkit
As already mentioned, with GWT, developers can develop & debug the Ajax apps in Java language with the help of Java development tools of their choice.
GWT does not only revolve around the user interface programming.
The developer, in deed, can make multiple architectural decisions.
The GWT mission statement explains the philosophical breakdown of GWT’s role versus the developer’s role.
An example can be taken from history.
Even though GWT manages history tokens as users click “Forward” or “Back” in the browser, it doesn’t define or determine how to map the history tokens to an app state.
There are two modes that GWT apps run in-
Development Mode (or Hosted Mode)
The app is run as Java Bytecode within the JVM (Java Virtual Machine).
This mode is commonly used for development and supports debugging and hot-swapping of code.
In the year 2014, the classic employment of Dev Mode was concluded unusable by the browser updates until it was replaced by the more compatible “Super Dev Mode”- which became the default in GWT 2.7.
Production Mode (or Web Mode)
This mode is generally used for deployment.
Many open-source plugins are now available, making GWT development easy with other IDEs, including Cypal Studio for GWT,
GWT4NB for NetBeans, and GWT developer for JDeveloper.