XAMJ is an XML UI and text markup language tightly integraded with Java. XAMJ applications/pages may be deployed over HTTP (like HTML or Java Webstart) or locally on a user's PC.

XAMJ allows embedding Java code in several types of scriptlets, much like JSP, except on the client side (with security restrictions.) That is, a XAMJ document is translated into a Java class, called a clientlet.

There is no need to pre-compile or package XAMJ code. Testing your changes involves simply modifying the source code and running it, much like trying out changes to an HTML page.

XAMJ UI markup is a lot more compact than equivalent Swing or SWT code. XML UI languages in general are considered Rapid Application Development (RAD) tools for this very reason.

XAMJ apps can also be standalone. In Windows you can simply double-click a .xamj file. Compilation is on-demand and cached, so it has the major benefits of an interpreted language, without being one.