Connect Four is a two-player game with "perfect information". This term describes games where one player at a time plays, players have all the information about moves that have taken place and all moves that can take place, for a given game state. I have implement this game using Scene Builder, which is a design tool that enables you to create a graphical user interface (GUI) by dragging and dropping components right onto the content panel. While you design the view with Scene Builder it generates a file with the name extension .fxml, which contains XML-like tags with attributes that reflect your design. I have also used cascading style sheets (CSS). The file with .fxml extension contains the GUI represented by XML-like tags. Each JavaFX event is inherited from javafx.event.Event, which has such fields as source and target.
