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Setting a Textfield in MainController through Controller Instance Reference in another file

Im trying to set the Text of a Textfield in my MainController from another file.
I read that this:
FXMLLoader loader = new FXMLLoader(getClass().getResource("main.fxml"));
MainController mc = (MainController) loader.getController();
is how you're supposed to get a reference to the Controller Instance in Javafx. I tried to implement it, but it gives me a NullPointerException when trying to set the TextField.
Here is my Code:
Main.java:
package application;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.image.Image;
import javafx.stage.Stage;
public class Main extends Application {
static MainController mc;
#Override
public void start(Stage primaryStage) {
try {
Parent root = FXMLLoader.load(getClass().getResource("main.fxml"));
Scene scene = new Scene(root,348,212);
scene.getStylesheets().add(getClass().getResource("application.css").toExternalForm());
primaryStage.setScene(scene);
primaryStage.setTitle("Flextime calculator");
primaryStage.getIcons().add(new Image(getClass().getResourceAsStream("assets/icon.png")));
primaryStage.setResizable(false);
FXMLLoader loader = new FXMLLoader(getClass().getResource("main.fxml"));
mc = (MainController) loader.getController();
primaryStage.show();
} catch(Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
launch(args);
}
public static MainController getMc() {
return mc;
}
}
MainController.java:
public class MainController {
#FXML Label fxFlextime;
#FXML Label fxTotalFlextime;
#FXML TextField fxStarttime;
#FXML TextField fxEndtime;
#FXML TextField fxDailyWorktime;
#FXML TextField fxBreaktime;
#FXML TextField fxAddBreaktime;
#FXML TextField fxBreakGap;
#FXML CheckBox fxAddBreak;
//Create Model, Userconfig
Model model = new Model();
UserConfig config = new UserConfig();
public void initialize() {
config.initialize();
}
}
UserConfig.java:
public class UserConfig {
public void initialize() {
insertDefault();
}
void insertDefault() {
List<String> prefValues = getPreference();
//FXMLLoader loader = new FXMLLoader(getClass().getResource("main.fxml"));
//MainController mc = (MainController) loader.getController();
// ^Tried also putting it here to see wether im referencing the variable wrong or something,
// so maybe im getting the Controller wrong? With mc.fxStarttime.setText("") it also didnt work here
Main.mc.fxStarttime.setText("");
Main.mc.fxEndtime.setText(prefValues.get(2));
Main.mc.fxDailyWorktime.setText(prefValues.get(3));
Main.mc.fxBreaktime.setText(prefValues.get(4));
Main.mc.fxAddBreaktime.setText(prefValues.get(5));
Main.mc.fxBreakGap.setText(prefValues.get(6));
}
static List<String> getPreference() {
// This will define a node in which the preferences can be stored
Preferences userPrefs = Preferences.userNodeForPackage(Main.class);
try {
String[] keys = userPrefs.keys();
if (keys == null) {
userPrefs.put("DEFStarttime" , "1");
userPrefs.put("DEFEndtime" , "");
userPrefs.put("DEFDailyWorktime", "");
userPrefs.put("DEFBreaktime" , "");
userPrefs.put("DEFAddBreaktime" , "");
userPrefs.put("DEFBreakGap" , "");
}
} catch (BackingStoreException ex) {
System.err.println(ex);
}
List<String> prefValues = new ArrayList<String>();
prefValues.add(userPrefs.get("DEFStarttime" , ""));
prefValues.add(userPrefs.get("DEFEndtime" , ""));
prefValues.add(userPrefs.get("DEFDailyWorktime" , ""));
prefValues.add(userPrefs.get("DEFBreaktime" , ""));
prefValues.add(userPrefs.get("DEFAddBreaktime" , ""));
prefValues.add(userPrefs.get("DEFBreakGap" , ""));
/*
for(String string : prefValues) {
System.out.println(string);
}
*/
return prefValues;
}
}
The Error:
javafx.fxml.LoadException:
/C:/eclipse-workspace/project/bin/application/main.fxml
at javafx.fxml/javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2625)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2595)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2466)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3237)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3194)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3163)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3136)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3113)
at javafx.fxml/javafx.fxml.FXMLLoader.load(FXMLLoader.java:3106)
at application.Main.start(Main.java:18)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$9(LauncherImpl.java:846)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runAndWait$12(PlatformImpl.java:455)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:428)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:391)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$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.win.WinApplication._runLoop(Native Method)
at javafx.graphics/com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:174)
at java.base/java.lang.Thread.run(Thread.java:830)
Caused by: java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:567)
at com.sun.javafx.reflect.Trampoline.invoke(MethodUtil.java:76)
at jdk.internal.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:567)
at javafx.base/com.sun.javafx.reflect.MethodUtil.invoke(MethodUtil.java:273)
at javafx.fxml/com.sun.javafx.fxml.MethodHelper.invoke(MethodHelper.java:83)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2591)
... 17 more
Caused by: java.lang.NullPointerException
at application.UserConfig.insertDefault(UserConfig.java:25)
at application.UserConfig.initialize(UserConfig.java:18)
at application.MainController.initialize(MainController.java:39)
... 28 more
I tried to cut it down to the minimal amount of code.
Edit:
Here the Main.fxml:
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.geometry.Insets?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.CheckBox?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.Menu?>
<?import javafx.scene.control.MenuBar?>
<?import javafx.scene.control.MenuItem?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.layout.FlowPane?>
<?import javafx.scene.layout.VBox?>
<VBox maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="212.0" prefWidth="348.0" xmlns="http://javafx.com/javafx/11.0.1" xmlns:fx="http://javafx.com/fxml/1" fx:controller="application.MainController">
<children>
<MenuBar fx:id="fxMenuBar">
<menus>
<Menu fx:id="fxFileMenu" mnemonicParsing="false" text="File">
<items>
<MenuItem fx:id="fxExitItem" mnemonicParsing="false" onAction="#exitProgram" text="Exit" />
</items>
</Menu>
<Menu mnemonicParsing="false" text="Settings">
<items>
<MenuItem mnemonicParsing="false" text="About" />
</items>
</Menu>
</menus>
</MenuBar>
<FlowPane alignment="CENTER_LEFT" prefHeight="25.0" prefWidth="403.0">
<children>
<Label alignment="CENTER" prefHeight="15.0" prefWidth="65.0" text="Starttime:" underline="true">
<FlowPane.margin>
<Insets left="10.0" top="10.0" />
</FlowPane.margin>
</Label>
<TextField fx:id="fxStarttime" alignment="CENTER" prefHeight="25.0" prefWidth="45.0" promptText="00:00">
<FlowPane.margin>
<Insets top="10.0" />
</FlowPane.margin></TextField>
<Label alignment="CENTER" prefHeight="17.0" prefWidth="112.0" text="Required daily hours:" underline="true">
<FlowPane.margin>
<Insets left="10.0" right="5.0" top="10.0" />
</FlowPane.margin>
</Label>
<TextField fx:id="fxDailyWorktime" alignment="CENTER" prefHeight="25.0" prefWidth="45.0" promptText="00.00">
<FlowPane.margin>
<Insets top="10.0" />
</FlowPane.margin></TextField>
</children>
</FlowPane>
<FlowPane alignment="CENTER_LEFT" prefHeight="36.0" prefWidth="300.0">
<children>
<Label alignment="CENTER" prefHeight="15.0" prefWidth="65.0" text="Endtime:" underline="true">
<FlowPane.margin>
<Insets left="10.0" />
</FlowPane.margin>
</Label>
<TextField fx:id="fxEndtime" alignment="CENTER" prefHeight="25.0" prefWidth="45.0" promptText="00:00" />
<Label alignment="CENTER" prefHeight="15.0" prefWidth="65.0" text="Breaktime:" underline="true">
<FlowPane.margin>
<Insets left="57.0" right="5.0" />
</FlowPane.margin>
</Label>
<TextField fx:id="fxBreaktime" alignment="CENTER" prefHeight="25.0" prefWidth="45.0" promptText="00" />
</children>
</FlowPane>
<FlowPane prefHeight="38.0" prefWidth="300.0">
<children>
<CheckBox fx:id="fxAddBreak" mnemonicParsing="false" text="Add:">
<FlowPane.margin>
<Insets left="20.0" top="5.0" />
</FlowPane.margin>
</CheckBox>
<TextField fx:id="fxAddBreaktime" alignment="CENTER" prefHeight="25.0" prefWidth="45.0" promptText="00">
<FlowPane.margin>
<Insets left="10.0" right="5.0" top="5.0" />
</FlowPane.margin>
</TextField>
<Label text="breaktime from ">
<FlowPane.margin>
<Insets top="5.0" />
</FlowPane.margin>
</Label>
<TextField fx:id="fxBreakGap" alignment="CENTER" prefHeight="25.0" prefWidth="45.0" promptText="00.00">
<FlowPane.margin>
<Insets top="5.0" />
</FlowPane.margin>
</TextField>
<Label text="working hours">
<FlowPane.margin>
<Insets left="5.0" top="5.0" />
</FlowPane.margin>
</Label>
</children>
</FlowPane>
<FlowPane alignment="CENTER_RIGHT" prefHeight="32.0" prefWidth="300.0">
<children>
<Label text="Flextime:">
<FlowPane.margin>
<Insets right="10.0" />
</FlowPane.margin>
</Label>
<Label fx:id="fxFlextime" alignment="CENTER" prefHeight="10.0" prefWidth="35.0" text="0.00" textAlignment="CENTER">
<FlowPane.margin>
<Insets />
</FlowPane.margin>
</Label>
<Label text="h">
<FlowPane.margin>
<Insets right="10.0" />
</FlowPane.margin>
</Label>
</children>
</FlowPane>
<FlowPane alignment="CENTER_RIGHT" prefHeight="32.0" prefWidth="300.0">
<children>
<Label text="Total flextime:" underline="true">
<FlowPane.margin>
<Insets right="10.0" />
</FlowPane.margin>
</Label>
<Label fx:id="fxTotalFlextime" alignment="CENTER" prefHeight="10.0" prefWidth="35.0" text="0.00" textAlignment="CENTER">
<FlowPane.margin>
<Insets />
</FlowPane.margin>
</Label>
<Label text="h">
<FlowPane.margin>
<Insets right="10.0" />
</FlowPane.margin>
</Label>
</children>
</FlowPane>
<FlowPane alignment="CENTER_RIGHT" prefHeight="38.0" prefWidth="300.0">
<children>
<Button mnemonicParsing="false" onAction="#calculate" text="Calculate" underline="true">
<FlowPane.margin>
<Insets right="10.0" />
</FlowPane.margin>
</Button>
<Button mnemonicParsing="false" onAction="#addToTotal" text="Add to total" />
<Button mnemonicParsing="false" onAction="#clear" text="Clear">
<FlowPane.margin>
<Insets left="10.0" right="10.0" />
</FlowPane.margin>
</Button>
</children>
</FlowPane>
</children>
</VBox>

The reason why you are getting the NullPointerException is because the Main.mc is null at the point where you are trying to access it fields in UserConfig.
In the line where you load your main.fxml Parent root = FXMLLoader.load(getClass().getResource("main.fxml")); the initialize() method in the controller MainController is invoked and at that point you are invoking userConfig.initialize() which also make a backward reference to Main.mc which at that point is null.
You can make the config public in your MainController class and initialize user config after you set the mc field in the Main class. Or you can inject the MainController as parameter into the UserConfig initialize method.
Main.java
FXMLLoader loader = new FXMLLoader(getClass().getResource("main.fxml"));
Parent root = (Parent) loader.load();
Scene scene = new Scene(root,348,212);
scene.getStylesheets().add(getClass().getResource("application.css").toExternalForm());
primaryStage.setScene(scene);
primaryStage.setTitle("Flextime calculator");
primaryStage.getIcons().add(new Image(getClass().getResourceAsStream("assets/icon.png")));
primaryStage.setResizable(false);
mc = (MainController) loader.getController();
mc.config.initialize();
MainController.java
public UserConfig config = new UserConfig();
#FXML
public void initialize() {
//remove the config.initialize(); from here
}

BorderPane always return null value

I am dealing with JavaFX , I am trying to get my graphical composant from my FXML page into the java classes, but it always return null value
Page.fxml
<?import javafx.scene.control.ScrollPane?>
<?import javafx.scene.layout.BorderPane?>
<ScrollPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" xmlns="http://javafx.com/javafx/8.0.172-ea" xmlns:fx="http://javafx.com/fxml/1" fx:controller="sample.Controller">
<content>
<BorderPane maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" fx:id="Mycontent">
<top>
<fx:include source="TopMenu.fxml" />
</top>
<center>
<fx:include source="Operation.fxml" />
</center>
<left>
<fx:include source="SideBar_Inhumer.fxml" />
</left>
<bottom>
<fx:include source="Footer.fxml" />
</bottom>
</BorderPane>
</content>
</ScrollPane>
Controller.java
package sample;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.fxml.Initializable;
import javafx.scene.layout.BorderPane;
import java.net.URL;
import java.util.ResourceBundle;
public class Controller implements Initializable {
#FXML
public BorderPane Mycontent;
#FXML
public void goToDemandeur(){
System.out.println(Mycontent);
//Mycontent.setCenter(FXMLLoader.load(getClass().getResource("Demandeur.fxml")));
}
#Override
public void initialize(URL location, ResourceBundle resources) {
}
}
My code always print "null"
if I try for example Mycontent.getCenter()it gives me this error
Exception in thread "JavaFX Application Thread" java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
(which normal because Mycontent is null, but why it is null? )
PS: my method goToDemandeur() is called into an other fxml page SideBar_Inhumer.fxml after a click onMouseClicked="#goToDemandeur"
SideBar_Inhumer.fxml
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.geometry.Insets?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.layout.Pane?>
<?import javafx.scene.layout.VBox?>
<?import javafx.scene.text.Font?>
<VBox layoutX="77.0" xmlns="http://javafx.com/javafx/8.0.172-ea" xmlns:fx="http://javafx.com/fxml/1" fx:controller="sample.Controller">
<children>
<Pane >
<children>
<Label alignment="CENTER" text="Inhumer" >
<font>
<Font size="24.0" />
</font>
<padding>
<Insets bottom="20.0" left="25.0" right="25.0" top="30.0" />
</padding>
</Label>
</children>
</Pane>
<Pane style="-fx-background-color: #F08080;" onMouseClicked="#goToDemandeur">
<children>
<Label text="Demandeur" >
<font>
<Font size="15.0" />
</font>
<padding>
<Insets bottom="10.0" left="20.0" right="20.0" top="10.0" />
</padding>
</Label>
</children>
<VBox.margin>
<Insets />
</VBox.margin>
</Pane>
<Pane style="-fx-background-color: #C6E2B9;">
<children>
<Label text="Defunt">
<font>
<Font size="15.0" />
</font>
<padding>
<Insets bottom="10.0" left="20.0" right="20.0" top="10.0" />
</padding>
</Label>
</children>
</Pane>
<Pane style="-fx-background-color: #FBF6A5;">
<children>
<Label text="Emplacement">
<font>
<Font size="15.0" />
</font>
<padding>
<Insets bottom="10.0" left="20.0" right="20.0" top="10.0" />
</padding>
</Label>
</children>
</Pane>
<Pane style="-fx-background-color: #FFCC99;">
<children>
<Label text="Prestataire">
<font>
<Font size="15.0" />
</font>
<padding>
<Insets bottom="10.0" left="20.0" right="20.0" top="10.0" />
</padding>
</Label>
</children>
</Pane>
<Pane style="-fx-background-color: #D8B46D;">
<children>
<Label text="Opération">
<font>
<Font size="15.0" />
</font>
<padding>
<Insets bottom="10.0" left="20.0" right="20.0" top="10.0" />
</padding>
</Label>
</children>
</Pane>
</children>
</VBox>
Main.java
package View;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.geometry.Rectangle2D;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Screen;
import javafx.stage.Stage;
public class Main extends Application {
#Override
public void start(Stage primaryStage) throws Exception{
Parent root = FXMLLoader.load(getClass().getResource("../View/Page.fxml"));
primaryStage.setTitle("Finalys");
Screen screen = Screen.getPrimary();
Rectangle2D bounds = screen.getVisualBounds();
Scene scene =new Scene(root, 600, 475);
primaryStage.setX(bounds.getMinX());
primaryStage.setY(bounds.getMinY());
primaryStage.setWidth(bounds.getWidth());
primaryStage.setHeight(bounds.getHeight());
primaryStage.setScene(scene);
primaryStage.show();
scene.getStylesheets().add(Main.class.getResource("bootstrap2.css").toExternalForm());
}
public static void main(String[] args) {
launch(args);
}
}

JavaFX and Scene Builder won't show Combo Box Options

I am having trouble displaying the combo box options in javafx and scene builder.
First I have tried to do use an array, which I guess does not work. I then tried to use an ObservableList<String> and create an instance of the combo box like
ComboBox combo = new ComboBox(list);
This still would not show the combobox options.
Controller class:
package javafxapplication1;
import javafxapplication1.JavaFXApplication1;
import java.net.URL;
import static java.util.Collections.list;
import java.util.ResourceBundle;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.ComboBox;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javax.lang.model.element.Element;
/**
*
* #author KJ4CC
*/
public class FXMLDocumentController implements Initializable {
ObservableList<String> options =
FXCollections.observableArrayList(
"Option 1",
"Option 2",
"Option 3"
);
#FXML
private Label label;
#FXML
private TextField dateText;
#FXML
private TextField time;
#FXML
private ComboBox band;
public void setTimeDate(){
JavaFXApplication1 javaFXApp = new JavaFXApplication1();
dateText.setText(javaFXApp.getDate());
}
public void setTime(){
JavaFXApplication1 javaFXApp = new JavaFXApplication1();
time.setText(javaFXApp.getTime());
}
#Override
public void initialize(URL url, ResourceBundle rb) {
band = new ComboBox(options);
}
}
Main java class:
public class JavaFXApplication1 extends Application {
private FXMLDocumentController initScene;
private DateFormat dtf;
#Override
public void start(Stage stage) throws Exception {
Parent root = FXMLLoader.load(getClass().getResource("FXMLDocument.fxml"));
Scene scene = new Scene(root);
stage.setScene(scene);
stage.show();
}
/**
* #param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
public String getDate(){
dtf = new SimpleDateFormat("dd/MM/yy");
Date dateobj = new Date();
return dtf.format(dateobj);
}
public String getTime(){
dtf = new SimpleDateFormat("HH:mm;ss");
Date dateobj = new Date();
return dtf.format(dateobj);
}
}
FXML
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.geometry.Insets?>
<?import javafx.scene.control.ComboBox?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.Menu?>
<?import javafx.scene.control.MenuBar?>
<?import javafx.scene.control.MenuItem?>
<?import javafx.scene.control.TableColumn?>
<?import javafx.scene.control.TableView?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.layout.BorderPane?>
<?import javafx.scene.layout.HBox?>
<?import javafx.scene.layout.VBox?>
<?import javafx.scene.text.Text?>
<BorderPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="383.0" prefWidth="590.0" xmlns="http://javafx.com/javafx/8.0.111" xmlns:fx="http://javafx.com/fxml/1" fx:controller="javafxapplication1.FXMLDocumentController">
<top>
<VBox prefHeight="235.0" prefWidth="543.0" BorderPane.alignment="CENTER">
<children>
<MenuBar>
<menus>
<Menu mnemonicParsing="false" text="File">
<items>
<MenuItem mnemonicParsing="false" text="Close" />
</items>
</Menu>
<Menu mnemonicParsing="false" text="Edit">
<items>
<MenuItem mnemonicParsing="false" text="Delete" />
</items>
</Menu>
<Menu mnemonicParsing="false" text="Help">
<items>
<MenuItem mnemonicParsing="false" text="About" />
</items>
</Menu>
</menus>
</MenuBar>
<TableView prefHeight="210.0" prefWidth="634.0">
<columns>
<TableColumn prefWidth="75.0" text="C1" />
<TableColumn prefWidth="75.0" text="C2" />
</columns>
<VBox.margin>
<Insets left="2.0" right="2.0" />
</VBox.margin>
</TableView>
</children>
</VBox>
</top>
<bottom>
<VBox prefHeight="160.0" prefWidth="676.0" BorderPane.alignment="CENTER">
<children>
<HBox prefHeight="22.0" prefWidth="625.0">
<children>
<Text strokeType="OUTSIDE" strokeWidth="0.0" text="Date:" wrappingWidth="83.462890625">
<HBox.margin>
<Insets left="5.0" right="20.0" />
</HBox.margin>
</Text>
<Label onMouseClicked="#setTimeDate" />
<Text strokeType="OUTSIDE" strokeWidth="0.0" text="Time:" wrappingWidth="73.40625" />
<Text strokeType="OUTSIDE" strokeWidth="0.0" text="Call:" wrappingWidth="122.94921875">
<HBox.margin>
<Insets left="5.0" />
</HBox.margin>
</Text>
<Text strokeType="OUTSIDE" strokeWidth="0.0" text="Band:" wrappingWidth="58.443359375" />
<Text strokeType="OUTSIDE" strokeWidth="0.0" text="Freq:" wrappingWidth="106.974609375" />
<Text strokeType="OUTSIDE" strokeWidth="0.0" text="Location:" />
</children>
</HBox>
<HBox prefHeight="35.0" prefWidth="625.0">
<children>
<TextField id="dateText" fx:id="dateText" prefHeight="25.0" prefWidth="94.0">
<HBox.margin>
<Insets left="5.0" />
</HBox.margin>
</TextField>
<TextField fx:id="time" layoutX="10.0" layoutY="10.0" prefHeight="25.0" prefWidth="71.0">
<padding>
<Insets left="5.0" />
</padding>
<HBox.margin>
<Insets left="10.0" right="10.0" />
</HBox.margin>
</TextField>
<TextField layoutX="104.0" layoutY="10.0" prefHeight="25.0" prefWidth="101.0">
<HBox.margin>
<Insets right="10.0" />
</HBox.margin>
</TextField>
<ComboBox fx:id="band" prefHeight="25.0" prefWidth="57.0">
<HBox.margin>
<Insets right="10.0" />
</HBox.margin>
</ComboBox>
<TextField layoutX="306.0" layoutY="10.0" prefHeight="25.0" prefWidth="101.0">
<HBox.margin>
<Insets right="10.0" />
</HBox.margin>
</TextField>
<TextField layoutX="306.0" layoutY="10.0" prefHeight="25.0" prefWidth="101.0" />
</children>
</HBox>
<HBox prefHeight="30.0" prefWidth="580.0">
<children>
<Text fill="#14bdd7" onMouseClicked="#setTimeDate" strokeType="OUTSIDE" strokeWidth="0.0" text="Use Current Date">
<HBox.margin>
<Insets right="20.0" />
</HBox.margin>
</Text>
<Text fill="#14bdd7" layoutX="10.0" layoutY="23.0" onMouseClicked="#setTime" strokeType="OUTSIDE" strokeWidth="0.0" text="Use Current Time" />
</children>
</HBox>
</children>
<BorderPane.margin>
<Insets left="5.0" right="5.0" />
</BorderPane.margin>
</VBox>
</bottom>
</BorderPane>
Any help would be appreciated! I am kind of new to this scene builder stuff and using javafx. I am just feeling my way around it. Thanks for the help!

Ok so i figured out the problem. I was creating a new instance of a combo box thus creating an empty one. Here is the method with the revised working code.
public void initialize(URL url, ResourceBundle rb) {
ObservableList<String> options =
FXCollections.observableArrayList(
"Option 1",
"Option 2",
"Option 3"
);
band.setItems(options);
}

Self made port scanner not working with JavaFX

So I have created a port scanner in Java.
While using Swing, everything works smoothly with 0 errors.
I however tried to convert my app to a JavaFX style of GUI, and nothing works when I press the buttons (Even though I have set the method ID's in the GUI builder).
What seems to be my problem?
My code:
package networkTools.gui;
import java.net.Socket;
import java.net.URL;
import java.util.ResourceBundle;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextArea;
import javafx.scene.control.TextField;
public class PortScannerController implements Initializable {
#FXML
TextField hostName;
#FXML
TextField fromPort;
#FXML
TextArea log;
#FXML
Button scan;
#FXML
Button reset;
#FXML
Label label;
#Override
public void initialize(URL url, ResourceBundle rb) {
hostName.requestFocus();
}
public void initFocus() {
hostName.requestFocus();
}
#FXML
private void onScan() {
int fp;
String h;
Socket s;
if (hostName.getText().equals("")) {
log.setText("Fill everything correct.");
return;
} else if (fromPort.getText().equals("")) {
log.setText("Fill everything correct..");
return;
} else if (!fromPort.getText().matches("[0-9]*")) {
log.setText("Give a number for a port ");
return;
}
// scan.disable(false);
reset.setText("Stop");
log.setText("");
log.clear();
label.setText("");
h = hostName.getText();
fp = Integer.parseInt(fromPort.getText());
label.setText("Port " + fp + " being tested (max +- 15 sec.)");
try {
s = new Socket(h, fp);
log.appendText("Poort " + fp + " is open.\n");
log.clear();
s.close();
} catch (Exception er) {
log.appendText("Poort " + fp + " is closed");
}
// scan.setEnabled(true);
reset.setText("Reset");
label.setText("Press scan to start.");
}
}
FXML:
<?xml version="1.0" encoding="UTF-8"?>
<?import java.lang.*?>
<?import javafx.geometry.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.text.*?>
<?import javafx.geometry.Insets?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.TextArea?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.control.ToggleButton?>
<?import javafx.scene.layout.ColumnConstraints?>
<?import javafx.scene.layout.GridPane?>
<?import javafx.scene.layout.RowConstraints?>
<?import javafx.scene.layout.StackPane?>
<?import javafx.scene.layout.VBox?>
<?import javafx.scene.text.Font?>
<VBox id="pane" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="400.0" stylesheets="#style.css" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="networkTools.gui.PortScannerController">
<children>
<StackPane prefHeight="80.0" prefWidth="600.0">
<children>
<Label id="title" alignment="CENTER" maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" prefHeight="50.0" prefWidth="400.0" text="Port Scanner" StackPane.alignment="CENTER">
<font>
<Font name="Arial Black" size="18.0" />
</font>
</Label>
</children>
</StackPane>
<GridPane>
<columnConstraints>
<ColumnConstraints hgrow="SOMETIMES" maxWidth="295.0" minWidth="10.0" prefWidth="131.0" />
<ColumnConstraints hgrow="SOMETIMES" maxWidth="407.0" minWidth="10.0" prefWidth="269.0" />
</columnConstraints>
<rowConstraints>
<RowConstraints maxHeight="50.0" minHeight="50.0" prefHeight="50.0" vgrow="SOMETIMES" />
<RowConstraints maxHeight="50.0" minHeight="50.0" prefHeight="50.0" vgrow="SOMETIMES" />
<RowConstraints maxHeight="50.0" minHeight="50.0" prefHeight="50.0" vgrow="SOMETIMES" />
</rowConstraints>
<children>
<Label alignment="CENTER" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="25.0" prefWidth="100.0" text="Host Name">
<font>
<Font name="Arial Black" size="12.0" />
</font>
<GridPane.margin>
<Insets left="10.0" />
</GridPane.margin>
</Label>
<Label alignment="CENTER" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="25.0" prefWidth="100.0" text="Port" GridPane.rowIndex="1">
<font>
<Font name="Arial Black" size="12.0" />
</font>
<GridPane.margin>
<Insets left="10.0" />
</GridPane.margin>
</Label>
<TextField fx:id="fromPort" GridPane.columnIndex="1" GridPane.rowIndex="1">
<GridPane.margin>
<Insets bottom="10.0" left="10.0" right="10.0" top="10.0" />
</GridPane.margin>
<font>
<Font name="Arial Black" size="12.0" />
</font>
</TextField>
<ToggleButton id="commandbutton" fx:id="onScan" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" mnemonicParsing="false" prefHeight="25.0" prefWidth="100.0" text="Scan" GridPane.halignment="CENTER" GridPane.rowIndex="2" GridPane.valignment="CENTER">
<font>
<Font name="Arial Black" size="12.0" />
</font>
</ToggleButton>
<ToggleButton id="commandbutton" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" mnemonicParsing="false" prefHeight="25.0" prefWidth="100.0" text="Reset" GridPane.columnIndex="1" GridPane.halignment="CENTER" GridPane.rowIndex="2" GridPane.valignment="CENTER">
<font>
<Font name="Arial Black" size="12.0" />
</font>
</ToggleButton>
<TextField fx:id="hostName" GridPane.columnIndex="1">
<GridPane.margin>
<Insets bottom="10.0" left="10.0" right="10.0" top="10.0" />
</GridPane.margin>
<font>
<Font name="Arial Black" size="12.0" />
</font>
</TextField>
</children>
</GridPane>
<TextArea id="textpane" fx:id="log" editable="false" prefHeight="148.0" prefWidth="600.0">
<VBox.margin>
<Insets bottom="10.0" left="10.0" right="10.0" top="10.0" />
</VBox.margin>
</TextArea>
<StackPane prefHeight="80.0" prefWidth="380.0" VBox.vgrow="NEVER">
<VBox.margin>
<Insets bottom="10.0" left="20.0" />
</VBox.margin>
<children>
<Label alignment="CENTER" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="25.0" prefWidth="200.0" text="Press Scan to start" textFill="#1815c9">
<font>
<Font name="Arial Black" size="13.0" />
</font>
</Label>
</children>
</StackPane>
</children>
</VBox>

There is nowhere that you associate the handler with the button. You need an onAction="#onScan" in the FXML for the "Scan" button:
<ToggleButton id="commandbutton" onAction="#onScan" fx:id="onScan" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" mnemonicParsing="false" prefHeight="25.0" prefWidth="100.0" text="Scan" GridPane.halignment="CENTER" GridPane.rowIndex="2" GridPane.valignment="CENTER">
There are several other things that look incorrect in your FXML:
You have several elements with the same CSS id ("commandButton" for example); you should use a styleClass instead of an id if you want to share style among several components.
You declare an fx:id="onScan" for the button above, but there is no field in your controller called onScan.
It's not really clear why you are using a ToggleButton instead of a regular Button for what appears to be an action. ToggleButtons are generally intended for toggling between two different states, not issuing a command/action.

ListView or ScrollPane scrollbars don't scroll

For a university project I have to create a GUI for an online version of a table game, the player can have some cards which I created by extending JavaFX ImageView and I want to put them inside the interface at runtime.
Therefore I inserted a JavaFX ListView inside a SplitPane but when I run my application the scroll bar doesn't work.
The cards are perfectly displayed and the scroll bar is visible, but when I try to use it, it just seems like a disabled button.
The same happens if I use a ScrollPane containing an HBox.
I tried to not use preferred sizes, I tried ScrollBarPolicies, nothing seems to work, in the end I came to the conclusion that the problem is somewhere inside the SplitPane.
I even thought maybe the JavaFX Application Thread stopped but when the scrollbar doesn't work it is actually running.
FXML
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.ListView?>
<?import javafx.scene.control.SplitPane?>
<?import javafx.scene.image.Image?>
<?import javafx.scene.image.ImageView?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.ColumnConstraints?>
<?import javafx.scene.layout.GridPane?>
<?import javafx.scene.layout.Pane?>
<?import javafx.scene.layout.RowConstraints?>
<?import javafx.scene.text.Font?>
<SplitPane fx:id="mainPlayerRootPane" disable="true" dividerPositions="0.10275689223057644" prefHeight="337.0" styleClass="mainPlayerRootPane" stylesheets="#style.css" xmlns="http://javafx.com/javafx/8.0.65" xmlns:fx="http://javafx.com/fxml/1" fx:controller="client.view.GUI.MainPlayerPaneController">
<items>
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="160.0" prefWidth="100.0">
<children>
<GridPane prefHeight="335.0" prefWidth="78.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<columnConstraints>
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" />
</columnConstraints>
<rowConstraints>
<RowConstraints maxHeight="116.0" minHeight="10.0" prefHeight="80.0" vgrow="SOMETIMES" />
<RowConstraints maxHeight="118.0" minHeight="10.0" prefHeight="82.0" vgrow="SOMETIMES" />
<RowConstraints maxHeight="138.0" minHeight="10.0" prefHeight="86.0" vgrow="SOMETIMES" />
<RowConstraints maxHeight="85.0" minHeight="10.0" prefHeight="85.0" vgrow="SOMETIMES" />
</rowConstraints>
<children>
<Pane prefHeight="85.0" translateX="4.0">
<children>
<ImageView fitHeight="77.0" fitWidth="73.0" layoutX="5.0" layoutY="1.0" pickOnBounds="true" preserveRatio="true">
<image>
<Image url="#../../../../resources/images/VictoryPoints.png" />
</image>
</ImageView>
<Label fx:id="victoryPointsLabel" alignment="TOP_CENTER" contentDisplay="CENTER" opacity="0.9" prefHeight="79.0" prefWidth="70.0" text="99" textAlignment="JUSTIFY" textFill="WHITE">
<font>
<Font name="Trattatello" size="36.0" />
</font>
</Label>
</children>
</Pane>
<Pane prefHeight="85.0" translateX="4.0" GridPane.rowIndex="1">
<children>
<ImageView fitHeight="79.0" fitWidth="71.0" layoutY="4.0" pickOnBounds="true" preserveRatio="true">
<image>
<Image url="#../../../../resources/images/Coins.png" />
</image>
</ImageView>
<Label fx:id="coinsLabel" alignment="CENTER" contentDisplay="CENTER" opacity="0.9" prefHeight="82.0" prefWidth="77.0" text="20" textFill="#222020">
<font>
<Font name="Trattatello" size="30.0" />
</font>
</Label>
</children>
</Pane>
<Pane prefHeight="85.0" prefWidth="81.0" translateX="4.0" GridPane.rowIndex="2">
<children>
<ImageView fitHeight="79.0" fitWidth="73.0" layoutX="17.0" layoutY="2.0" pickOnBounds="true" preserveRatio="true">
<image>
<Image url="#../../../../resources/images/Servants.png" />
</image>
</ImageView>
<Label fx:id="servantsLabel" alignment="CENTER" contentDisplay="CENTER" opacity="0.9" prefHeight="101.0" prefWidth="70.0" text="10" textFill="#bcc600">
<font>
<Font name="Trattatello" size="24.0" />
</font>
</Label>
</children>
</Pane>
<Pane prefHeight="85.0" translateX="4.0" GridPane.rowIndex="3">
<children>
<ImageView fitHeight="79.0" fitWidth="71.0" layoutX="1.0" layoutY="3.0" pickOnBounds="true" preserveRatio="true">
<image>
<Image url="#../../../../resources/images/Emporiums.png" />
</image>
</ImageView>
<Label fx:id="emporiumsLabel" alignment="CENTER" contentDisplay="CENTER" layoutY="8.0" prefHeight="73.0" prefWidth="71.0" text="10">
<font>
<Font name="Trattatello" size="36.0" />
</font>
</Label>
</children>
</Pane>
</children>
</GridPane>
</children>
</AnchorPane>
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="160.0">
<children>
<SplitPane dividerPositions="0.5345345345345346" orientation="VERTICAL" prefHeight="335.0" styleClass="mainPlayerRootPane" stylesheets="#style.css" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<items>
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="100.0">
<children>
<SplitPane dividerPositions="0.5" prefHeight="174.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<items>
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="160.0">
<children>
<ListView fx:id="cardsListView" editable="true" orientation="HORIZONTAL" prefHeight="172.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0" />
</children>
</AnchorPane>
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="160.0">
<children>
<ListView fx:id="permitsListView" orientation="HORIZONTAL" prefHeight="172.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0" />
</children>
</AnchorPane>
</items>
</SplitPane>
</children>
</AnchorPane>
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="134.0" prefWidth="710.0" />
</items>
</SplitPane>
</children>
</AnchorPane>
</items>
</SplitPane>
Its controller class:
package client.view.GUI;
import java.util.List;
import client.model_properties.PlayerProperty;
import javafx.collections.ListChangeListener;
import javafx.fxml.FXML;
import javafx.scene.Node;
import javafx.scene.control.Label;
import javafx.scene.control.ListView;
import javafx.scene.control.SplitPane;
public class MainPlayerPaneController {
#FXML
private Label victoryPointsLabel;
#FXML
private Label coinsLabel;
#FXML
private Label servantsLabel;
#FXML
private Label emporiumsLabel;
#FXML
private SplitPane mainPlayerRootPane;
#FXML
private ListView<PoliticalCardView> cardsListView;
#FXML
private ListView<PoliticalCardView> permitsListView;
#FXML
private void initialize(){
}
public void initializeMainPlayerPane(PlayerProperty mainPlayer) {
this.victoryPointsLabel.textProperty().bind(mainPlayer.getVictoryPoint().asString());
this.coinsLabel.textProperty().bind(mainPlayer.getCoins().asString());
this.servantsLabel.textProperty().bind(mainPlayer.getnOfServants().asString());
this.emporiumsLabel.textProperty().bind(mainPlayer.getAvailableEmporiums().asString());
this.addToDeckView(mainPlayer.getDeck());
mainPlayer.getDeckProperty().addListener(new DeckListChangeListener());
}
private void addToDeckView(List<? extends String> cards) {
PoliticalCardView auxCard;
for(String n : cards) {
auxCard = new PoliticalCardView(n);
auxCard.initializeCardView();
this.cardsListView.getItems().add(auxCard);
}
}
private class DeckListChangeListener implements ListChangeListener<String> {
#Override
public void onChanged(javafx.collections.ListChangeListener.Change<? extends String> c) {
List<? extends String> added = c.getAddedSubList();
List<? extends String> removed = c.getRemoved();
for(String n : removed) {
Node toRemove = cardsListView.getItems().stream()
.filter( r -> ((PoliticalCardView) r).getColor().equals(n))
.findFirst()
.get();
cardsListView.getItems().remove(toRemove);
}
addToDeckView(added);
}
}
}
And the class i created to represent the cards.
package client.view.GUI;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import utility.UserInterfaceUtilities;
public class PoliticalCardView extends ImageView {
private Image cardImage;
private String color;
public PoliticalCardView(String color) {
this.color = color;
}
public void initializeCardView() {
this.cardImage = UserInterfaceUtilities.POLITICAL_COLORS_TO_IMAGES.get(this.color);
this.setImage(cardImage);
this.setFitHeight(150);
this.setFitWidth(100);
}
public String getColor() {
return this.color;
}
}
I would like to know where's the problem since in two days of research I haven't found nothing similar on the internet and also i used other scrollbars which work just fine.

The problem is here:
<SplitPane fx:id="mainPlayerRootPane" disable="true" ..... >
Your SplitPane is disabled.
When you disable a Node by setting its disabledProperty, all of its children become disabled.
Indicates whether or not this Node is disabled. A Node will become
disabled if disable is set to true on either itself or one of its
ancestors in the scene graph.
Remove disable="true" from the FXML declaration to avoid disabling your ListView or ScrollPane.