error: java.lang.reflect.InvocationTargetException

Question

i have tried to creat a login with javaFX but when i tried to test my program ,this problem happen:Exception in application start method(i still haven't completed the code in LoginController.java , I just made the ui for Login.fxml). it is on the same package.

Login.java(My Main):

package ihm_project;
import javafx.application.Application;
import javafx.fxml.*;

import javafx.scene.*;

import javafx.stage.Stage;

public class Login extends Application {

@Override
public void start(Stage stage) throws Exception {
    
    Parent parent = FXMLLoader.load(getClass().getResource("Login.fxml"));
    Scene scene = new Scene(parent);
    stage.setScene(scene);
    stage.show();   
}
public static void main(String[] args) {
    launch(args);
}  
}

LoginController:

package ihm_project;
import java.awt.*;
import java.net.URL;
import java.util.ResourceBundle;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.fxml.*;
public class LoginController implements Initializable {



 @FXML
private TextField Email;
@FXML
private TextField Password;
@FXML
private Button Login;
@FXML
private Label Message;  
@FXML
public void LoginOnClick(ActionEvent e){
    if(Email.getText().isEmpty()&&Password.getText().isEmpty())
    {
      Message.setText("try to login!");
    }
}



@Override
public void initialize(URL url, ResourceBundle rb) {
}    
}

Login.fxml:

the error:

Exception in Application start method
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62 
)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:389)
at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:328)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:767)
Caused by: java.lang.RuntimeException: Exception in Application start method
at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:917)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$155(LauncherImpl.java:182)
at java.lang.Thread.run(Thread.java:745)
Caused by: javafx.fxml.LoadException: 
file:/C:/Users/HP/Documents/NetBeansProjects/Ihm_Project/dist/run1839873334/ 
Ihm_Project.jar!/ihm_project/Login.fxml:27
at javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2601)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2579)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2441)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3214)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3175)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3148)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3124)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3104)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:3097)
at ihm_project.Login.start(Login.java:23)
at com.sun.javafx.application.LauncherImpl.lambda$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)
... 1 more
Caused by: java.lang.IllegalArgumentException: Can not set java.awt.TextField field ihm_project.LoginController.Email to javafx.scene.control.TextField
at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:167)
at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:171)
at sun.reflect.UnsafeObjectFieldAccessorImpl.set(UnsafeObjectFieldAccessorImpl.java:81)
at java.lang.reflect.Field.set(Field.java:764)
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
  Exception running application ihm_project.Login Java Result: 1 Deleting 
directory 
C:\Users\HP\Documents\NetBeansProjects\Ihm_Project\dist\run1839873334

Abdelrahman Nassar · Accepted Answer

In the error message you have, there is this line:

Caused by: java.lang.IllegalArgumentException: Can not set java.awt.TextField field ihm_project.LoginController.Email to javafx.scene.control.TextField

so make sure that your text field "Email" is of type javafx.scene.control.TextField not java.awt.TextField

and to be sure that the type of TextField is the correct type, delete this line in your code import java.awt.*;, if no error occurs, it means that you are using the correct type

error: java.lang.reflect.InvocationTargetException

Answers (1)

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