这是我的项目，我将javafxml与我的代码一起使用，但不起作用     什么是错误的帮助我快速帮助我，我想通过gui向用户显示具有文本问候的标签。下面是代码：

    package tacticalchaos;
    import Project.*;
    import java.util.*;
    import javafx.application.Application;
    import javafx.fxml.FXMLLoader;
    import javafx.scene.Parent; 
    import javafx.scene.Scene;
    import javafx.stage.Stage;
    public class TacticalChaos {
    @Override
    public void start(Stage stage) throws Exception {
    Parent root = FXMLLoader.load(getclass().getResource("FXMLDocument.fxml"));  
    Scene scene = new Scene(root);    
    stage.setScene(scene);
    stage.show();
    }
    /**
    * @param args the command line arguments
    */
    public static void main(String[] args) {
    // TODO code application logic here
    Ways way = new Ways();
    Scanner in = new Scanner(System.in);
    System.out.println("Choose (1) For console\n(2) For GUI: ");
    switch (in.nextInt()) {
    case 1:
    Console w = new Console();
    way = w;
    break;
    case 2: {
    Gui ww = new Gui();
    way = ww;
    launch(args);
    break;
    }
    }
    way.Print1("hello");
    }
    //controller class
    i want to show for user by gui the label which has text hello 
    package Project;
    import java.net.URL;
    import java.util.List;
    import java.util.ResourceBundle;
    import java.util.Scanner;
    import javafx.fxml.FXML;
    import javafx.fxml.Initializable;
    import javafx.scene.Scene;
    import javafx.scene.control.ChoiceBox;
    import javafx.scene.control.Label;
    import javafx.scene.layout.StackPane;
    /**
    * FXML Controller class
    *
    * @author Asus
    */
    public class GuifxController extends Ways implements Initializable {
    @FXML
    private Label chinfo1;
    private String a,inf1;
    /**
    * Initializes the controller class.
    */
    @Override
    public void initialize(URL url,ResourceBundle rb) {
    chinfo1.setText("");
    }
    public void Print1(Object... obj) {
    inf1 = "";
    for (Object c : obj) {
    inf1 += c.toString();
    }
    inf1 += "\n";
    System.out.print(inf1);
    l.setText(inf1);
    }}