Javafx problem that doesn't find the fxml file even if they are in the same package. I really can't find any errors in the code and so your comments are more than welcome and SceneBuilder now doesn't allow me to open the fxml file because it says that the fx:controller can only be applied to root element, but i already put the fx controller in the root element .
Main Class
package application;
import javafx.application.Application;
import javafx.stage.Stage;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Alert;
import javafx.scene.control.Alert.AlertType;
import javafx.fxml.FXMLLoader;
public class LoginRegistrazioneDB extends Application {
@Override public void start(Stage primaryStage) throws Exception{
FXMLLoader loader = new FXMLLoader(getClass().getResource("LoginRegFxml.fxml"));
Parent root = loader.load();
Scene scene = new Scene(root);
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
Fxml file named LoginRegFxml.fxml
<?import javafx.scene.text.*?>
<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<VBox fx:controller="LoginRegistrazioneDB/LoginRegFxmlController"
xmlns:fx="http://javafx.com/fxml">
<AnchorPane fx:controller="LoginRegistrazioneDB/LoginRegFxmlController" id="AnchorPane" prefHeight="699.0" prefWidth="1061.0" style="-fx-background-color: black;" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="application.LoginRegFxmlController">
<children>
<Accordion expandedPane="$tpReg" layoutX="52.0" layoutY="148.0" prefHeight="504.0" prefWidth="938.0">
<panes>
<TitledPane fx:id="tpReg" animated="false" text="Registrazione">
<content>
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="180.0" prefWidth="200.0">
<children>
<TextField fx:id="usernameReg" layoutX="497.0" layoutY="60.0" prefHeight="31.0" prefWidth="285.0" />
<TextField fx:id="emailReg" layoutX="497.0" layoutY="119.0" prefHeight="31.0" prefWidth="286.0" />
<PasswordField fx:id="passwordReg" layoutX="498.0" layoutY="181.0" prefHeight="31.0" prefWidth="286.0" />
<DatePicker fx:id="date" layoutX="498.0" layoutY="239.0" prefHeight="31.0" prefWidth="287.0" />
<Label layoutX="38.0" layoutY="55.0" prefHeight="41.0" prefWidth="199.0" text="Username">
<font>
<Font name="Yu Gothic Light" size="26.0" />
</font>
</Label>
<Label layoutX="38.0" layoutY="177.0" prefHeight="40.0" prefWidth="121.0" text="Password">
<font>
<Font name="Yu Gothic Light" size="26.0" />
</font>
</Label>
<Label layoutX="38.0" layoutY="232.0" prefHeight="46.0" prefWidth="182.0" text="Data di Nascita">
<font>
<Font name="Yu Gothic Light" size="26.0" />
</font>
</Label>
<Label layoutX="38.0" layoutY="119.0" prefHeight="31.0" prefWidth="84.0" text="Email">
<font>
<Font name="Yu Gothic Light" size="26.0" />
</font>
</Label>
<Button fx:id="buttonReg" layoutX="782.0" layoutY="353.0" mnemonicParsing="false" onAction="#handleButtonClick" style="-fx-background-color: purple;" text="Registrazione" textFill="WHITE" />
<ProgressIndicator fx:id="progressReg" layoutX="723.0" layoutY="343.0" progress="0.0" />
</children>
</AnchorPane>
</content>
</TitledPane>
<TitledPane animated="false" text="Login">
<content>
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="180.0" prefWidth="200.0">
<children>
<Label layoutX="47.0" layoutY="80.0" prefHeight="58.0" prefWidth="159.0" text="Username ">
<font>
<Font name="Yu Gothic Light" size="30.0" />
</font>
</Label>
<Label layoutX="47.0" layoutY="169.0" prefHeight="52.0" prefWidth="140.0" text="Password">
<font>
<Font name="Yu Gothic Light" size="30.0" />
</font>
</Label>
<PasswordField fx:id="passwordLog" layoutX="368.0" layoutY="180.0" prefHeight="31.0" prefWidth="465.0" />
<TextField fx:id="usernameLog" layoutX="368.0" layoutY="94.0" prefHeight="31.0" prefWidth="465.0" />
<Button fx:id="buttonLog" onAction="#handleButtonClickLog" layoutX="775.0" layoutY="304.0" mnemonicParsing="false" prefHeight="56.0" prefWidth="116.0" style="-fx-background-color: purple;" text="Login" textFill="WHITE" />
<ProgressIndicator fx:id="progressLog" layoutX="713.0" layoutY="303.0" prefHeight="58.0" prefWidth="36.0" progress="0.0" />
</children>
</AnchorPane>
</content>
</TitledPane>
</panes>
</Accordion>
<Text fx:id="textPrin" fill="WHITE" layoutX="52.0" layoutY="61.0" strokeType="OUTSIDE" strokeWidth="0.0" text="DC PROGRAMS" wrappingWidth="236.90087890625">
<font>
<Font name="PMingLiU-ExtB" size="42.0" />
</font>
</Text>
</children>
</AnchorPane>
</VBox>
Controller
package application;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.util.Optional;
import java.util.logging.Level;
import java.util.logging.Logger;
import javafx.event.*;
import javafx.fxml.FXML;
import javafx.scene.control.*;
import javafx.scene.control.Alert.AlertType;
import javafx.scene.text.*;
import javafx.stage.*;
import javafx.scene.*;
public class LoginRegFxmlController {
@FXML
private TitledPane tpReg;
@FXML
private Text textPrin;
//Registration
@FXML
private TextField usernameReg;
@FXML
private TextField emailReg;
@FXML
private PasswordField passwordReg;
@FXML
private DatePicker date;
@FXML
private ProgressIndicator progressReg;
@FXML
public Button buttonReg;
public void handleButtonClick(ActionEvent event) {
//perchè non funziona la funzione gettext su username
String u = usernameReg.getText();
String e = emailReg.getText();
//algo per password
String p = passwordReg.getText();
LocalDate dataIns = date.getValue();
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
String d = dataIns.format(formatter);
String url = "jdbc:mysql://localhost/utentiapp?serverTimezone=Europe/Rome";
String user = "root";
String pass = "";
try {
Connection conn = DriverManager.getConnection(url, user, pass);
Statement s = conn.createStatement();
String checkQ = "SELECT USERNAME, EMAIL FROM UTENTI "
+ " WHERE USERNAME = '"+u+"' ";
ResultSet st = s.executeQuery(checkQ);
int f=0;
do {
String UserName = st.getString("USERNAME");
String Email = st.getString("EMAIL");
if(u==UserName && e==Email) {
// need to put different alerts
}else if(u==UserName && e!=Email) {
// need to put different alerts
}else if(u!=UserName && e==Email) {
// need to put different alerts
}else {
f=1;
}
}while(f!=1);
String q = "INSERT INTO UTENTI "
+ " ( USERNAME ,EMAIL ,PASSWORD ,DATANASCITA ,RUOLO ) "
+ " VALUES ('"+u+"','"+e+"','"+p+"','"+d+"','USER') ";
int N = s.executeUpdate(q);
if(N==1) {
infoAlert();
}
else {
warnAlert();
}
} catch (SQLException ex) {
Logger.getLogger(LoginRegFxmlController.class.getName()).log(Level.SEVERE, null, ex);
}
}
//Login
@FXML
private TextField usernameLog;
@FXML
private PasswordField passwordLog;
@FXML
private ProgressIndicator progressLog;
@FXML
private Button buttonLog;
public void handleButtonClickLog() {
}
public void infoAlert() {
Alert alertConf = new Alert(AlertType.INFORMATION,"", ButtonType.OK);
alertConf.setTitle("Registrazione");
alertConf.setHeaderText(null);
alertConf.setContentText("Registrazione effettuata con successo");
alertConf.getDialogPane().setPrefSize(200, 200);
Optional<ButtonType> result = alertConf.showAndWait();
if(result.get() == ButtonType.OK) {
}
}
public void warnAlert() {
Alert alertWarn = new Alert(AlertType.ERROR);
alertWarn.setTitle("Errore");
alertWarn.setHeaderText(null);
alertWarn.setContentText("Errore nell'inserimento");
Optional<ButtonType> result = alertWarn.showAndWait();
if(result.get() == ButtonType.OK) {
}
}
}
Prompt errors
Exception in Application start method
java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:119)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at [email protected]/com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:464)
at [email protected]/com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:363)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at java.base/sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:1081)
Caused by: java.lang.RuntimeException: Exception in Application start method
at [email protected]/com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:893)
at [email protected]/com.sun.javafx.application.LauncherImpl.lambda$launchApplication$2(LauncherImpl.java:195)
at java.base/java.lang.Thread.run(Thread.java:1623)
Caused by: javafx.fxml.LoadException:
/C:/Users/user/eclipse-workspace/LoginRegistrazioneDB/bin/application/LoginRegFxml.fxml:15
at [email protected]/javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2722)
at [email protected]/javafx.fxml.FXMLLoader$ValueElement.processAttribute(FXMLLoader.java:935)
at [email protected]/javafx.fxml.FXMLLoader$InstanceDeclarationElement.processAttribute(FXMLLoader.java:983)
at [email protected]/javafx.fxml.FXMLLoader$Element.processStartElement(FXMLLoader.java:230)
at [email protected]/javafx.fxml.FXMLLoader$ValueElement.processStartElement(FXMLLoader.java:757)
at [email protected]/javafx.fxml.FXMLLoader.processStartElement(FXMLLoader.java:2853)
at [email protected]/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2649)
at [email protected]/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2563)
at [email protected]/javafx.fxml.FXMLLoader.load(FXMLLoader.java:2531)
at LoginRegistrazioneDB/application.LoginRegistrazioneDB.start(LoginRegistrazioneDB.java:16)
at [email protected]/com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$9(LauncherImpl.java:839)
at [email protected]/com.sun.javafx.application.PlatformImpl.lambda$runAndWait$12(PlatformImpl.java:483)
at [email protected]/com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:456)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:400)
at [email protected]/com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:455)
at [email protected]/com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at [email protected]/com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at [email protected]/com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:185)
... 1 more
Caused by: java.lang.ClassNotFoundException: LoginRegistrazioneDB/LoginRegFxmlController
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
at [email protected]/javafx.fxml.FXMLLoader$ValueElement.processAttribute(FXMLLoader.java:933)
... 17 more
Exception running application application.LoginRegistrazioneDB
Javafx problem that doesn't find the .fxml file even if they are in the same package.
That's not the problem. The exception stacktrace says that JavaFX is not able to load a class:
Caused by: java.lang.ClassNotFoundException: LoginRegistrazioneDB/LoginRegFxmlController
The cause of the problem is in the .fxml file. It says:
<VBox fx:controller="LoginRegistrazioneDB/LoginRegFxmlController" ...
and
<AnchorPane fx:controller="LoginRegistrazioneDB/LoginRegFxmlController"
id="AnchorPane" prefHeight="699.0" prefWidth="1061.0"
style="-fx-background-color: black;"
xmlns="http://javafx.com/javafx/8"
xmlns:fx="http://javafx.com/fxml/1"
fx:controller="application.LoginRegFxmlController">
but the LoginRegFxmlController is actually declared in the application package, not the LoginRegistrazioneDB package.
So the classloader has been told to look for a class which doesn't exist!!
You need to carefully review the .fxml file and make sure that the class and package names that you have used there match your code.
(And AFAIK you shouldn't be using a / in the fx:controller values. The documentation uses a . in the classes FQN just like Java source code does.)
(And you shouldn't have two fx:controller attributes in the AnchorPane element. That's wrong. It's not even valid XML.)