@startuml interface Button { + render() : void + onClick() : void } class HtmlButton { } class WindowsButton { } Button <|.. HtmlButton Button <|.. WindowsButton abstract Dialog { + renderWindow() : void + {abstract} createButton() : Button } class HtmlDialog { } class WindowsDialog { } Dialog <|.. HtmlDialog Dialog <|.. WindowsDialog @enduml Submit amiga aws-orange black-knight bluegray blueprint cerulean-outline cerulean crt-amber crt-green cyborg-outline cyborg hacker lightgray mars materia-outline materia metal mimeograph minty plain reddress-darkblue reddress-darkgreen reddress-darkorange reddress-darkred reddress-lightblue reddress-lightgreen reddress-lightorange reddress-lightred sandstone silver sketchy-outline sketchy spacelab spacelab-white superhero-outline superhero toy united vibrant       🎉 Discover the future PlantUML Web Editor! 🚀  PNG  SVG  ASCII Art