javafx fxml LoadException

Question

I am quite new at JavaFx. I am trying to build a simple calculator by following a tutorial . I followed the tutorial step by step . When I run the project , it shows javafx fxml LoadException. I watched some solution relating to this but still I can not fix it. Please help me to fix this error.(Sorry for a long post)

my program files are below

MainController.java

package application;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.scene.control.Button;
import javafx.scene.control.Label;

public class MainController {

@FXML
private Label result; // label variable shows output above the buttons, check this
private long number1 = 0;
private String operator = "";
private boolean start = true;
private Model model = new Model();

@FXML
public void processNumbers(ActionEvent event) {
    if (start) {
        result.setText(""); // set the label(output) screen as blank first
        start = false;
    }
    String value = ((Button) event.getSource()).getText(); // take number 1-9 and convert it into String, import the
                                                            // button class otherwise will shows error
    result.setText(result.getText() + value);
}

@FXML
public void processOperators(ActionEvent event) {
    String value = ((Button) event.getSource()).getText();`enter code here`

    if (!value.equals("=")) {
        if (!operator.isEmpty()) {
            return;
        }
        operator = value;
        number1 = Long.parseLong(result.getText());
        result.setText("");
    } else {
        if (operator.isEmpty())
            return;
        long number2 = Long.parseLong(result.getText());
        float output = model.calculate(number2, number2, operator); 

        result.setText(String.valueOf(output));
        start = true;
        }
      }

 }

Model.java

 package application;

public class Model { //for some action event 

    public float calculate(long number1,long number2,String operator) {

    switch(operator) {
        case "+":
            return number1+number2;
        case "-":
            return number1-number2;
        case "*":
            return number1*number2;
        case "/":
            if(number2==0) return 0;
            return number1+number2;
        default:
            return 0;

        }//switch case


    }


}

Main.java

package application;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.stage.Stage;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.layout.BorderPane;
import javafx.scene.control.*;

public class Main extends Application {
    @Override
    public void start(Stage primaryStage) {
        try {
            Parent root = (Parent) FXMLLoader.load(getClass().getResource("/application/CalculatorFxmlFile.fxml"));
            Scene scene = new Scene(root,400,400);
            scene.getStylesheets().add(getClass().getResource("application.css").toExternalForm());
            primaryStage.setScene(scene);
            primaryStage.show();
        } catch(Exception e) {
            e.printStackTrace();
        }
    }

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

CalculatorFxmlFile

Exceptions generated

javafx.fxml.LoadException: 
/C:/AllPrograms/Java/eclipse1/CalculatorJavaFx/bin/application/CalculatorFxmlFile.fxml:37

    at javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2601)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2579)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2441)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3214)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3175)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3148)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3124)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3104)
    at javafx.fxml.FXMLLoader.load(FXMLLoader.java:3097)
    at application.Main.start(Main.java:15)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$162(LauncherImpl.java:863)
    at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$175(PlatformImpl.java:326)
    at com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)
    at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.IllegalArgumentException: Can not set javafx.scene.control.Label field application.MainController.result to javafx.scene.control.Button
    at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(Unknown Source)
    at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(Unknown Source)
    at sun.reflect.UnsafeObjectFieldAccessorImpl.set(Unknown Source)
    at java.lang.reflect.Field.set(Unknown Source)
    at javafx.fxml.FXMLLoader.injectFields(FXMLLoader.java:1163)
    at javafx.fxml.FXMLLoader.access$1600(FXMLLoader.java:103)
    at javafx.fxml.FXMLLoader$ValueElement.processValue(FXMLLoader.java:857)
    at javafx.fxml.FXMLLoader$ValueElement.processStartElement(FXMLLoader.java:751)
    at javafx.fxml.FXMLLoader.processStartElement(FXMLLoader.java:2707)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2527)
    ... 17 more

javafx fxml LoadException

Answers (1)

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