This provides name of the application.

This adds other gwt module in application just like import does in java applications. Any number of modules can be inherited in this manner.

This specifies the name of class which will start loading the GWT Application. Any number of entry-point classes can be added and they are called sequentially in the order in which they appear in the module file. So when the onModuleLoad() of your first entry point finishes, the next entry point is called immediately.

This specifies the names of source folders which GWT compiler will search for source compilation.

The public path is the place in your project where static resources referenced by your GWT module, such as CSS or images, are stored. The default public path is the public subdirectory underneath where the Module XML File is stored.

Hello World

body {
   text-align: center;
   font-family: verdana, sans-serif;
}

h1 {
   font-size: 2em;
   font-weight: bold;
   color: #777777;
   margin: 40px 0px 70px;
   text-align: center;
}

public class HelloWorld implements EntryPoint {
   public void onModuleLoad() {
      Window.alert("Hello, World!");
   }
}