import javafx.application.Application;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.HBox;
import javafx.event.EventHandler;
import javafx.event.ActionEvent;

public class Knapper extends Application {
    @Override
    public void start(Stage stage) {

        Button knapp = new Button("Knapp");
        knapp.setOnAction(new FunksjonalitetForKnapp());

        Button knapp2 = new Button("Knapp 2");
        knapp2.setOnAction(new EventHandler<ActionEvent>(){
            @Override
            public void handle(ActionEvent e) {
                System.out.println("Dette kommer fra en anonym klasse!");
            }
        });

        Button knapp3 = new Button("Knapp 3");
        knapp3.setOnAction(e -> System.out.println("Lambda!!!"));

        HBox root = new HBox(knapp, knapp2, knapp3);
        Scene scene = new Scene(root);
        stage.setScene(scene);

        stage.setTitle("Knapper!");
        stage.show();
    }

    private class FunksjonalitetForKnapp implements EventHandler<ActionEvent>{
        @Override
        public void handle(ActionEvent e){
            System.out.println("funksjonalitet for knapp!");
        }
    }
}