Java無法找到方法符號

Question

我試圖從Controller.java中的connectEvent方法內部訪問一個方法，它給我錯誤：

Java: cannot find symbol
symbol: method getConnection()
location: variable main of type sample.Main

我忽略了什么嗎？ 我已經嘗試了所有的干杯

Controller.java

    package sample;

import javafx.beans.NamedArg;
import javafx.event.ActionEvent;
import javafx.event.Event;
import javafx.event.EventType;
import javafx.fxml.FXML;
import javafx.scene.control.Button;
import javafx.scene.control.TextArea;
import lombok.Getter;
import lombok.Setter;

public class Controller{

    @Getter
    private Main main;

    public Controller(Main main){
        this.main = main;
    }

    //FXML to Java Links

    @FXML
    @Getter
    private Button connectButton;

    @FXML
    @Getter
    private TextArea passwordText;

    @FXML
    @Getter
    private TextArea ipText;

    @FXML
    @Getter
    private TextArea usernameText;


    //FXML linked methods

    /**
     * Called when user tries to connect using supplied information
     */

    @FXML
    public void connectEvent(ActionEvent event){
        main.getConnection().connect(getUsernameText().getText(), passwordText.getText(), ipText.getText());
    }

}

Main.java

package sample;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;
import lombok.Getter;

public class Main extends Application {

    @Getter
    private Controller controller;

    @Getter
    private Connection connection = new Connection();

    @Override
    public void start(Stage primaryStage) throws Exception{

        FXMLLoader loader = new FXMLLoader(getClass().getResource("Startup.fxml"));
        controller = loader.getController();

        Parent root = loader.load(getClass().getResource("Startup.fxml"));
        primaryStage.setTitle("MCManager");
        primaryStage.setScene(new Scene(root, 850, 600));
        primaryStage.setResizable(false);
        primaryStage.show();

    }


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

}

連接

package sample;

public class Connection {

    public void connect(String username, String password, String ip){

    }

}

Answer 1

在您的控制器中，您正在調用main.getConnection()

@FXML
public void connectEvent(ActionEvent event){
    main.getConnection().connect(getUsernameText().getText(), passwordText.getText(), ipText.getText());
}

但是在Main類中沒有getConnection()方法。

將以下代碼放在Main類中。

public Connection  getConnection(){
 return connection;
}