Mario Code

/**
 * Created by Creator on 17/11/2016.
 */

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.MenuBar;
import javafx.scene.control.Menu;
import javafx.scene.control.TextField;
import javafx.scene.layout.*;
import javafx.stage.Stage;

import java.lang.reflect.Array;

public class Main extends Application{

    private Button sendButton;
    private HBox bottomHolder;
    private TextField txtfield;
    private BorderPane bp;
    private MenuBar menubar;
    private Menu menu_file;
    private Menu menu_peers;



    public static void main(String[] args){
        launch(args);
    }

    public void close(Stage st){
        st.close();
    }

    @Override
    public void start(Stage primaryStage) throws Exception {
        primaryStage.setTitle("Title of window");
        bp = new BorderPane();
        bottomHolder = new HBox(8);
        sendButton = new Button("Send");
        txtfield = new TextField();
        menubar = new MenuBar();
        menu_file = new Menu("File");
        menu_peers = new Menu("Peers");

        bp.setBottom(bottomHolder);
        bp.setTop(menubar);

        bottomHolder.getChildren().add(txtfield);
        bottomHolder.getChildren().add(sendButton);
        bottomHolder.setHgrow(txtfield, Priority.ALWAYS);
        bottomHolder.setHgrow(sendButton, Priority.NEVER);

        txtfield.setOnAction(new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent arg0) {
                txtfield.clear();
            }
        });

        sendButton.setOnAction(new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent arg0) {
                txtfield.clear();
            }
        });

        StackPane layout = new StackPane();
        layout.getChildren().add(bp);

        Scene scene = new Scene(layout, 300, 250);
        primaryStage.setScene(scene);

        primaryStage.show();
    }
}