import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Tab;
import javafx.scene.control.TabPane;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class TabPaneTest extends Application {
    
    public static void main(String[] args) {
        Application.launch(args);
    }

    @Override
    public void start(Stage stage) throws Exception {
        TabPane tabPane = new TabPane();
        
        addNewTab(tabPane);
        
        Scene scene = new Scene(tabPane, 320, 240);
        stage.setScene(scene);
        stage.setVisible(true);
    }
    
    private void addNewTab(final TabPane tabPane) {
        VBox vbox = new VBox();
        vbox.setPadding(new Insets(10));
        vbox.setSpacing(10);
        
        Button button = new Button("New tab");
        button.setOnAction(new EventHandler<ActionEvent>() {
            public void handle(ActionEvent t) {
                addNewTab(tabPane);
            }
        });
        vbox.getChildren().add(button);
        
        Tab tab = new Tab("Test");
        tab.setContent(vbox);
        tabPane.getTabs().add(tab);
        tabPane.getSelectionModel().select(tab);
    }
}