📖 JavaFX FXML Documentation

FXML (Formerly JavaFX Markup Language) is a markup language used to define the structure and layout of JavaFX applications. It allows developers to separate the UI design from the application logic, making it easier to collaborate with designers and maintain code.

📌 Core Concepts

• FXML Structure:
  • Uses XML syntax to describe UI components.
  • Components are defined with <fx:root> and nested <children> elements.
  • Example:

    <AnchorPane>  
      <Button text="Click Me" onAction="handleClick" />  
    </AnchorPane>  
    

• Binding & Data:
  • Supports property binding for dynamic updates.
  • Integrates with JavaBeans and FXML controllers.
• Controller Class:
  • Java class that handles event logic (e.g., handleClick).
  • Linked via the controller attribute in the root element.

🧩 Example Usage

1. Create an FXML file (e.g., example.fxml):

   <VBox xmlns="http://javafx.com/javafx/17" xmlns:fx="http://javafx.com/fxml/17">  
     <Label text="Hello, FXML!" />  
     <Button text="Submit" onAction="#submitAction" />  
   </VBox>  
   

2. Implement the controller:

   public class ExampleController {  
     public void submitAction(ActionEvent event) {  
       System.out.println("Button clicked!");  
     }  
   }  
   

3. Load FXML in Java code:

   FXMLLoader loader = new FXMLLoader(getClass().getResource("example.fxml"));  
   Parent root = loader.load();  
   

🌐 Related Resources

• JavaFX官方文档 for advanced features.
• FXML最佳实践指南 to optimize your UI code.

💡 FXML simplifies UI development but requires understanding of JavaFX's scene graph and binding mechanisms. Always test your FXML files with the JavaFX runtime to ensure compatibility.

For more tutorials on JavaFX, visit JavaFX Tutorials.