A developer designs and implements graphics, animations, and imaging capabilities using the Java API. They create graphical user interfaces (GUIs), charts, diagrams, and games, ensuring smooth rendering and optimal performance. They handle color management, pattern fills, complex shapes, text layout, and more. They also manage transformations, compositing, and rendering rules. Additionally, developers are responsible for testing, debugging, and improving the quality of graphics applications. They collaborate with other team members, often providing their expertise in solving complex graphical problems and improving the visual aspects of software applications.