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) {
        HBox root = new HBox();

        Button knapp = new Button("Knapp 1");
        knapp.setOnAction(new Knappebehandler());

        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!"));

        root.getChildren().addAll(knapp, knapp2, knapp3);


        stage.setScene(new Scene(root));
        stage.show();
    }

    private class Knappebehandler implements EventHandler<ActionEvent> {
        @Override
        public void handle(ActionEvent e) {
            System.out.println("Vanlig knappebehandler");
        }
    }
}