Integrated Development Environment with Object-Oriented GUI Rendering Feature

A method, computer program product, and data processing system for supporting an integrated development environment (IDE) for efficient graphical user interface (GUI) programming in source code are provided. The IDE user selects one or more GUI components for immediate rendering. The IDE, which has its own GUI, contains an event handler that detects modifications to the source code to the selected components. When a modification is detected, the IDE attempts to compile the source code to the modified component. If the compilation succeeds, the IDE dynamically loads the newly compiled code and executes the newly compiled code to render the component in the IDE's own runtime environment. Subsequent modifications to the component's source code result in immediate recompilation and rerendering of the component by the IDE so that the user is provided instant feedback as the GUI source code is modified.