This document discusses creating GUI applications with JavaFX. It covers topics like scene graphs, using Scene Builder to visually design JavaFX applications, writing application code including the main class and controller class, and working with common GUI components like radio buttons, check boxes, and displaying images. Scene Builder allows visually designing user interfaces by dragging and dropping components and saves the design as an FXML file. The main application class loads the FXML file and launches the application, while the controller class contains event handler methods.