NullPointerException in Intelli J javafx CRUD - intellij-idea

Question

I am trying to build javafx CRUD model with intellij and when I run the Main.java, Login window pops up. And when I type the correct username and password, another popup window in table so that where data can be created, read, updated and deleted.
After I typed correct password and username, Login window appeared, however, I faced NullPointerException in console as below.
When I hit Login button. I went back to two lines stated;
sortFilterTableView();
searchTextField.textProperty().addListener((observable, oldValue, newValue) -> {
there were no issues found. In other java and fxml files are all error-free. I rebuilt the project and ran it again many times but they didn't work showing me this same error. Any advice where should I begin to examine? Thank you. (Localhost is connected)
screenshot
Error in a console box
/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java --add-modules
javafx.base,javafx.graphics --add-reads javafx.base=ALL-UNNAMED
--add-reads javafx.graphics=ALL-UNNAMED -javaagent:/snap/intellij-idea-community/232/lib/idea_rt.jar=40981:/snap/intellij-idea-community/232/bin
-Dfile.encoding=UTF-8 -p /usr/share/openjfx/lib/javafx.base.jar:/usr/share/openjfx/lib/javafx.graphics.jar:/home/marie/IdeaProjects/CosmeticsJavaFX/src/out/production/CosmeticsJavaFX:/usr/share/openjfx/lib/javafx.controls.jar:/usr/share/openjfx/lib/javafx.fxml.jar:/usr/share/openjfx/lib/javafx.media.jar:/usr/share/openjfx/lib/javafx.swing.jar:/usr/share/openjfx/lib/javafx.web.jar:/home/marie/Downloads/mariadb-java-client-2.6.0.jar
-m CosmeticsJavaFX/application.Main
wwww
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Password matches
Radio button selected: null
User ID is: 9
Exception in thread "JavaFX Application Thread"
java.lang.NullPointerException at
CosmeticsJavaFX/application.DatabaseController.sortFilterTableView(DatabaseController.java:186)
at
CosmeticsJavaFX/application.DatabaseController.lambda$initialize$4(DatabaseController.java:101)
at
javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:428)
at java.base/java.security.AccessController.doPrivileged(Native
Method) at
javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:427)
at
javafx.graphics/com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)
at
javafx.graphics/com.sun.glass.ui.gtk.GtkApplication._runLoop(Native
Method) at
javafx.graphics/com.sun.glass.ui.gtk.GtkApplication.lambda$runLoop$11(GtkApplication.java:277)
at java.base/java.lang.Thread.run(Thread.java:834)
DatabaseController.java:101
#FXML
private void initialize(){
//initialize the tableView with four columns
itemIdColumn.setCellValueFactory(cellData -> cellData.getValue().itemIdProperty());
userIdColumn.setCellValueFactory(cellData -> cellData.getValue().userIdProperty());
labelColumn.setCellValueFactory(cellData -> cellData.getValue().labelProperty());
brandColumn.setCellValueFactory(cellData -> cellData.getValue().brandProperty());
setVisibleItems();
Platform.runLater(() -> {
//fill the tableView with data from observableList
try {
System.out.println("User ID is: " + userId);
tableView.setItems(getCosmeticsData());
buildCosmetics();
//line 101 below
sortFilterTableView();
//
observeRadioButtonChanges();
} catch (SQLException throwables) {
throwables.printStackTrace();
}
});
}
DatabaseController.java:186
private void sortFilterTableView() throws SQLException {
FilteredList<Cosmetics> filteredList = new FilteredList<>(getCosmeticsData(), p -> true);
//this is line 186 below
searchTextField.textProperty().addListener((observable, oldValue, newValue) -> {
//
filteredList.setPredicate(cosmetics -> {
//if search text is empty display all cosmetics
if(newValue == null || newValue.isEmpty()){
return true;
}
String lowerCaseFilter = newValue.toLowerCase();
if (cosmetics.getLabel().toLowerCase().contains(lowerCaseFilter)){
return true; // search string is a match
} else if(cosmetics.getBrand().toLowerCase().contains(lowerCaseFilter)){
return true; // search string is a match
}
return false; //does not match
});
});
SortedList<Cosmetics> sortedList = new SortedList<>(filteredList);
sortedList.comparatorProperty().bind(tableView.comparatorProperty());
tableView.setItems(sortedList);
}
Main.java
package application;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;
public class Main extends Application {
public static void main(String[] args) {
launch(args);
}
#Override
public void start(Stage stage) throws Exception{
FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("AddressScene.fxml"));
Parent root = (Parent) fxmlLoader.load();
// open the login scene
stage.setTitle("Server Address");
stage.setScene(new Scene(root));
stage.show();
}
}

Answer 1

Check the Java variable searchTextField has a corresponding FXML element with a matching fx:id
<TextField fx:id="searchTextField" .........