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

public class Knapper extends Application{

    public void start(Stage stage){

        Button knapp1 = new Button("knapp1");
        knapp1.setOnAction(new FunksjonalitetForKnapp1());

        Button knapp2 = new Button("knapp2");
        knapp2.setOnAction(new EventHandler<ActionEvent>(){
            @Override
            public void handle(ActionEvent e){
                System.out.println("Anonym klasse!");
            }
        });

        Button knapp3 = new Button("knapp3");
        knapp3.setOnAction((e) -> {
            System.out.println("Anonym metode / lambda");
        });

        HBox root = new HBox();
        root.getChildren().add(knapp1);
        root.getChildren().add(knapp2);
        root.getChildren().add(knapp3);
        Scene scene = new Scene(root);
        stage.setScene(scene);
        stage.show();
    }


}

class FunksjonalitetForKnapp1 implements EventHandler<ActionEvent>{
    @Override
    public void handle(ActionEvent e){
        System.out.println("vanlig klasse!");
    }

}