[BAEL-5774] Constructor vs. initialize() in JavaFX (#18838)

* [BAEL-6602] Copying text to clipboard in Java

* [BAEL-5774] Constructor vs. initialize() in JavaFX

* [BAEL-5774] fix: classes and contructor names

Author: haidar47x

core-java-modules/core-java-swing/pom.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
-    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <artifactId>core-java-swing</artifactId>
     <packaging>jar</packaging>

javafx/src/main/java/com/baeldung/controller/ControllerAnnotation.java

@@ -0,0 +1,20 @@
+package com.baeldung.controller;
+
+import javafx.fxml.FXML;
+import javafx.scene.control.Label;
+
+public class ControllerAnnotation {
+    private final String appName;
+
+    @FXML
+    private Label appNameLabel;
+
+    public ControllerAnnotation(String name) {
+        this.appName = name;
+    }
+
+    @FXML
+    public void initialize() {
+        this.appNameLabel.setText(this.appName);
+    }
+}

javafx/src/main/java/com/baeldung/controller/ControllerInitializable.java

@@ -0,0 +1,24 @@
+package com.baeldung.controller;
+
+import java.net.URL;
+import java.util.ResourceBundle;
+
+import javafx.fxml.FXML;
+import javafx.fxml.Initializable;
+import javafx.scene.control.Label;
+
+public class ControllerInitializable implements Initializable {
+    private final String appName;
+
+    @FXML
+    private Label appNameLabel;
+
+    public ControllerInitializable(String name) {
+        this.appName = name;
+    }
+
+    @Override
+    public void initialize(URL location, ResourceBundle res) {
+        this.appNameLabel.setText(this.appName);
+    }
+}

javafx/src/main/resources/app_name_label.fxml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<?import javafx.scene.control.Label?>
+<?import javafx.scene.layout.StackPane?>
+
+<StackPane xmlns:fx="http://javafx.com/fxml" fx:controller="your.package.YourController">
+    <Label fx:id="appNameLabel" text="Example App" />
+</StackPane>