Application template

public class Program {
    private String name;
    private String operatingSystem = "Windows 10";

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getOperatingSystem() {
        return operatingSystem;
    }

    public void setOperatingSystem(String operatingSystem) {
        this.operatingSystem = operatingSystem;
    }

    public static void main(String[] args) {
        Application app = new Application(
                 new UserInterface(
                         new UserControl[] {
                             new UserControl("Button"),
                             new UserControl()
                         }
                     )
            );
        app.present();
    }

    void run() {
        main(new String[0]);
    }
}

class Application extends Program {
    private UserInterface userInterface;

    Application(UserInterface userInterface) {
        this.userInterface = userInterface;
    }

    void present() {
        for(UserControl control: userInterface.getUserControls()) {
            control.click();
        }
    }
}

class UserInterface {
    private UserControl[] userControls;

    public UserControl[] getUserControls() {
        return userControls;
    }

    public void setUserControls(UserControl[] userControls) {
        this.userControls = userControls;
    }

    UserInterface(UserControl[] userControls) {
        this.userControls = userControls;
    }
}

class UserControl {
    private String specification;

    UserControl(String specification) {
        this.specification = specification;
    }

    UserControl(){}

    public String getSpecification() {
        return specification;
    }

    public void click() {
        System.out.println((specification != null ? specification + " has " : "I have ") + "been clicked!");
    }
}