Develop Reference

why JOptionPane.showMessageDialog just working in main?

I'm using NetBeans last version and macOS. I try this is my code and JOptionPane.showMessageDialog not working. It's working if I put the syntax in the main. Please tell me why. I try vscode, and I have same problem
import javax.swing.*;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.CheckBox;
import javafx.scene.control.Label;
import javafx.scene.control.RadioButton;
import javafx.scene.control.TextField;
import javafx.scene.control.TextInputDialog;
import javafx.scene.control.ToggleGroup;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.stage.Stage;
public class App extends Application {
TextField txt;
public void start(Stage primaryStage) {
Label lb1 = new Label();
TextField txt = new TextField("Type here");
RadioButton rb1 = new RadioButton();
RadioButton rb2 = new RadioButton();
Button bt = new Button("click");
Button bt1 = new Button("anas aljaghbeer");
MyHandlerClass handler1 = new MyHandlerClass();
bt.setOnAction(handler1);
txt.setPrefSize(10, 10);
lb1.setText("Enter here");
txt.getText();
VBox box = new VBox();
Scene scene = new Scene(box, 1000, 1000);
box.getChildren().addAll(lb1, txt, bt);
primaryStage.setTitle("anas");
primaryStage.setScene(scene);
primaryStage.show();
}
class MyHandlerClass implements EventHandler<ActionEvent> {
#Override
public void handle(ActionEvent e) {
JOptionPane.showMessageDialog(null, " Hello");
}
}
public static void main(String[] args) {
Application.launch(args);
}
}

JOptionPane.showMessageDialog()…It's working if I put the syntax in the main. Please tell me why.
When you invoke JOptionPane.showMessageDialog() in main(), it executes on the initial thread. In a Swing program, you would invoke it from main() like this:
public static void main(String[] args) {
EventQueue.invokeLater(() -> {
JOptionPane.showMessageDialog(null, "Click to continue…");
…
});
}
In a JavaFX program you are well advised not to "mix Swing and JavaFX," unless you account for JavaFX-Swing Interoperability. Instead, evoke an Alert as shown here and below:
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Alert;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
public class App extends Application {
TextField txt;
#Override
public void start(Stage primaryStage) {
Label label = new Label();
TextField text = new TextField("Type here");
Button button = new Button("Click");
MyHandlerClass handler = new MyHandlerClass();
button.setOnAction(handler);
text.setPrefSize(10, 10);
label.setText("Enter here");
text.getText();
VBox box = new VBox();
box.getChildren().addAll(label, text, button);
Scene scene = new Scene(box, 320, 240);
primaryStage.setScene(scene);
primaryStage.setTitle("anas");
primaryStage.show();
}
class MyHandlerClass implements EventHandler<ActionEvent> {
#Override
public void handle(ActionEvent e) {
Alert alert = new Alert(Alert.AlertType.INFORMATION, "You clicked the button.");
alert.showAndWait();
}
}
public static void main(String[] args) {
Application.launch(args);
}
}

I want to add items seperate from a ListView

Newbie question. I'm trying to make a javafx to do list class but i need to add a button and textfield to insert data to the listview. I want to add these but I can't add them directly to the listview. I dunno how to do it.
package learning;
import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ListView;
import javafx.scene.control.TextField;
import javafx.stage.Stage;
public class ToDoList extends Application{
private ObservableList<String> doList = FXCollections.observableArrayList();
private String text="";
public void start(Stage primaryStage){
primaryStage.setTitle("2DoList");
TextField userTextField = new TextField();
Button enter=new Button("Add");
enter.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent e) {
text= userTextField.getText();
doList.add(text);
userTextField.setText("");
text="";
}
});
ListView<String> root=new ListView<String>(doList);
Scene scene=new Scene(root,250,500);
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}

How to make a Button on a JavaFX's browser?

I'm trying to make a "launcher" with javafx.
This is my code :
I'm not shure you have to read all of this code, this code is here.
I'm trying to put a javaFX "play" button (i know how to make a button and how to set up an onclick event but i don't know where to add it :/)
Have you got an idea ? Thx.
package fr.whiteplay.main.launcher;
public class Launcher{
private static WebViewSample launcher;
private static String[] a;
public static void main(String[] args){
launcher = new WebViewSample();
a = args;
}
public static void start(){
launcher.go(a);
}
}
package fr.whiteplay.main.launcher;
import javafx.application.Application;
import javafx.geometry.HPos;
import javafx.geometry.VPos;
import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.layout.HBox;
import javafx.scene.layout.Priority;
import javafx.scene.layout.Region;
import javafx.scene.paint.Color;
import javafx.scene.web.WebEngine;
import javafx.scene.web.WebView;
import javafx.stage.Stage;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
public class WebViewSample extends Application{
private Browser browser;
private Scene scene;
public void start(Stage stage){
// create the scene
stage.setTitle("WhitePlay");
browser = new Browser();
scene = new Scene(browser, 992, 620, Color.web("#000000"));
stage.setScene(scene);
stage.show();
}
public static void go(String[] args){
launch(args);
}
}
package fr.whiteplay.main.launcher;
import javafx.geometry.HPos;
import javafx.geometry.VPos;
import javafx.scene.Node;
import javafx.scene.layout.HBox;
import javafx.scene.layout.Priority;
import javafx.scene.layout.Region;
import javafx.scene.web.WebEngine;
import javafx.scene.web.WebView;
class Browser extends Region{
final WebView browser = new WebView();
final WebEngine webEngine = browser.getEngine();
public Browser(){
getStyleClass().add("browser");
webEngine.load("http://www.whiteplay.fr/launcher/index.html");
getChildren().add(browser);
}
private Node createSpacer(){
Region spacer = new Region();
HBox.setHgrow(spacer, Priority.ALWAYS);
return spacer;
}
protected void layoutChildren(){
layoutInArea(browser, 0, 0, getWidth(), getHeight(), 0, HPos.CENTER, VPos.CENTER);
}
}

Instead of the browser itself, the scene root must be a structured panel, which contains the browser, the button, and whatever else.
The simplest example is to replace your WebViewSample.start() method with the following:
public void start(Stage stage){
// create the scene
stage.setTitle("WhitePlay");
browser = new Browser();
BorderPane root = new BorderPane();
root.setCenter(browser);
Button button = new Button("Play");
root.setBottom(button);
button.setOnAction(a -> System.out.println("Play"));
scene = new Scene(root, 992, 620, Color.web("#000000"));
stage.setScene(scene);
stage.show();
}
Check this page for further reference on various layouts options, and how to work with them.

Auto scroll down a TextArea

I have a TextArea that doesn't scroll down when I add text in it. I thought using this answer, but my TextArea is connected to a StringProperty like this :
consoleTextArea.textProperty().bind(textRecu);
So the answer doesn't work for me, is there another way to make my TextArea scroll down every time I update it by the binding?

Here is fast demo of what i meant in comment about adding listener to the textRecu. Yep consoleTextArea.textProperty() can't be changed because of a binding. But textRecu has no binding => can be changed and we can add listener to it.
import javafx.application.Application;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.TextArea;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
public class Main extends Application {
private StringProperty textRecu = new SimpleStringProperty();
private TextArea consoleTextArea = new TextArea();
#Override
public void start(Stage primaryStage) throws Exception{
VBox root = new VBox();
Button button = new Button("Add some text");
button.setOnMouseClicked(new EventHandler<MouseEvent>() {
#Override
public void handle(MouseEvent event) {
//here you change textRecu and not consoleTextArea.textProperty()
textRecu.setValue(textRecu.getValue() +"New Line\n");
}
});
root.getChildren().addAll(consoleTextArea, button);
consoleTextArea.textProperty().bind(textRecu);
//here you also add listener to the textRecu
textRecu.addListener(new ChangeListener<Object>() {
#Override
public void changed(ObservableValue<?> observable, Object oldValue,
Object newValue) {
// from stackoverflow.com/a/30264399/1032167
// for some reason setScrollTop will not scroll properly
//consoleTextArea.setScrollTop(Double.MAX_VALUE);
consoleTextArea.selectPositionCaret(consoleTextArea.getLength());
consoleTextArea.deselect();
}
});
primaryStage.setScene(new Scene(root, 300, 275));
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}

Getting Errors parsing FXML file into a javafx program

Im Getting These Errors when trying to parse this FXML file into my Java Program.The code for when i load in the FXML file and where i get the errors are bellow
package mediarealm;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;
import javafx.stage.StageStyle;
public class MediaRealm extends Application {
#Override
public void start(Stage primaryStage) {
Parent root = null;
primaryStage.initStyle(StageStyle.UNDECORATED);
try {
root = FXMLLoader.load(getClass().getResource("/rsrc /UIManagmentDefaultState.fxml"));
} catch (IOException ex) {
Logger.getLogger(MediaRealm.class.getName()).log(Level.SEVERE, null, ex);
}
root.setStyle("-fx-background-color: #000000;");
Scene scene = new Scene(root, 1280, 720);
primaryStage.setTitle("Hello World!");
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
It could possibly because of the code Bellow but I don't think it is i'm trying to load in some of the elements from the fxml file into the rest of my code so that i can have full access to said elements with java.
package mediarealm;
import javafx.collections.FXCollections;
import javafx.fxml.FXML;
import javafx.scene.control.Button;
public class Controller
{
#FXML private Button ExitButton;
#FXML private static Button myVideos;
public static void doshit()
{
myVideos.setText("Addison is gay!");
}

Probably a long shot, but the line
< fx:id="myMusic" /Button>
is no correct XML, it rather should be
</Button>