Table of Contents
JavaFX FXML Controller: Constructor vs. Initialize Method
Understanding the Initialization Sequence
Constructor vs. initialize() Method for Controller Initialization
Importance of initialize() Method's Access to FXML Fields
Example Usage
Home Java javaTutorial JavaFX FXML Controllers: Constructor or `initialize()` Method – Which One for Initialization?

JavaFX FXML Controllers: Constructor or `initialize()` Method – Which One for Initialization?

Dec 02, 2024 am 04:20 AM

JavaFX FXML Controllers: Constructor or `initialize()` Method – Which One for Initialization?

JavaFX FXML Controller: Constructor vs. Initialize Method

Understanding the Initialization Sequence

When using JavaFX with FXML, understanding the initialization sequence for controllers is crucial. After creating an instance of the controller class specified in the FXML file, the following steps occur:

  1. Constructor Invocation: The default constructor of the controller is invoked.
  2. FXML Field Population: Any fields in the controller annotated with @FXML are populated with the corresponding components defined in the FXML file.
  3. initialize() Method Call: The initialize() method of the controller is executed.

Constructor vs. initialize() Method for Controller Initialization

The constructor and the initialize() method serve distinct purposes in initializing the controller:

  • Constructor: The constructor is called first and is responsible for any initialization tasks independent of the FXML component references.
  • initialize() Method: The initialize() method is called after the FXML fields have been populated. It provides a suitable opportunity to perform any post-processing or additional initialization that requires access to these components.

Importance of initialize() Method's Access to FXML Fields

The ability of the initialize() method to access the FXML component references is crucial. While the constructor does not have access to these references, the initialize() method can use them to access control properties, set up event listeners, or perform other operations.

Example Usage

In the provided code example, the output demonstrates this behavior:

  • The constructor of MainViewController prints "first."
  • The initialize() method prints "second."

This sequence illustrates that the initialize() method is called after the FXML fields have been populated and is the appropriate place to use these references for controller initialization.

The above is the detailed content of JavaFX FXML Controllers: Constructor or `initialize()` Method – Which One for Initialization?. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Is the company's security software causing the application to fail to run? How to troubleshoot and solve it? Is the company's security software causing the application to fail to run? How to troubleshoot and solve it? Apr 19, 2025 pm 04:51 PM

Troubleshooting and solutions to the company's security software that causes some applications to not function properly. Many companies will deploy security software in order to ensure internal network security. ...

How to simplify field mapping issues in system docking using MapStruct? How to simplify field mapping issues in system docking using MapStruct? Apr 19, 2025 pm 06:21 PM

Field mapping processing in system docking often encounters a difficult problem when performing system docking: how to effectively map the interface fields of system A...

How to elegantly obtain entity class variable names to build database query conditions? How to elegantly obtain entity class variable names to build database query conditions? Apr 19, 2025 pm 11:42 PM

When using MyBatis-Plus or other ORM frameworks for database operations, it is often necessary to construct query conditions based on the attribute name of the entity class. If you manually every time...

How do I convert names to numbers to implement sorting and maintain consistency in groups? How do I convert names to numbers to implement sorting and maintain consistency in groups? Apr 19, 2025 pm 11:30 PM

Solutions to convert names to numbers to implement sorting In many application scenarios, users may need to sort in groups, especially in one...

How does IntelliJ IDEA identify the port number of a Spring Boot project without outputting a log? How does IntelliJ IDEA identify the port number of a Spring Boot project without outputting a log? Apr 19, 2025 pm 11:45 PM

Start Spring using IntelliJIDEAUltimate version...

How to safely convert Java objects to arrays? How to safely convert Java objects to arrays? Apr 19, 2025 pm 11:33 PM

Conversion of Java Objects and Arrays: In-depth discussion of the risks and correct methods of cast type conversion Many Java beginners will encounter the conversion of an object into an array...

E-commerce platform SKU and SPU database design: How to take into account both user-defined attributes and attributeless products? E-commerce platform SKU and SPU database design: How to take into account both user-defined attributes and attributeless products? Apr 19, 2025 pm 11:27 PM

Detailed explanation of the design of SKU and SPU tables on e-commerce platforms This article will discuss the database design issues of SKU and SPU in e-commerce platforms, especially how to deal with user-defined sales...

How to elegantly get entity class variable name building query conditions when using TKMyBatis for database query? How to elegantly get entity class variable name building query conditions when using TKMyBatis for database query? Apr 19, 2025 pm 09:51 PM

When using TKMyBatis for database queries, how to gracefully get entity class variable names to build query conditions is a common problem. This article will pin...

See all articles