The Lightweight UI Toolkit (LWUIT) is a lightweight widget library inspired by Swing but designed for constrained devices such as mobile phones and set-top boxes. Lightweight UI Toolkit supports pluggable theme-ability, a component and container hierarchy, and abstraction of the underlying GUI toolkit. The term lightweight indicates that the widgets in the library draw their state in Java source without native peer rendering.
LWUIT supports the following resource elements: images, animation, bitmap fonts, localization bundles, and themes. Resources are delivered as a bundle - a binary file that can be loaded and used on the device. Java ME Platform SDK supports LWUIT with an integrated Resource Manager for creating and maintaining resource bundles.