Debugging JavaFX Applications with IntelliJ IDEA

Are you tired of spending hours trying to find and fix bugs in your JavaFX applications? Do you wish there was a more efficient way to debug your code? Look no further than IntelliJ IDEA!

IntelliJ IDEA is a powerful integrated development environment (IDE) that offers a variety of debugging tools to help you identify and resolve issues in your JavaFX applications. In this article, we'll explore some of the key features of IntelliJ IDEA's debugging tools and how they can be used to streamline your development process.

Setting Up Your Environment

Before we dive into the specifics of debugging with IntelliJ IDEA, let's first make sure that your environment is set up correctly. To get started, you'll need to have the following installed:

Once you have these installed, you can create a new JavaFX project in IntelliJ IDEA by following these steps:

  1. Open IntelliJ IDEA and select "Create New Project" from the welcome screen.
  2. Select "JavaFX" from the list of project types and click "Next."
  3. Give your project a name and select a location to save it.
  4. Choose your JDK version and click "Next."
  5. Select the "JavaFX" library and click "Next."
  6. Click "Finish" to create your project.

With your project set up, you're ready to start debugging!

Debugging Your JavaFX Application

IntelliJ IDEA offers a variety of debugging tools that can help you identify and resolve issues in your JavaFX application. Let's take a look at some of the most useful tools.


Breakpoints are a powerful tool for debugging your JavaFX application. By setting a breakpoint, you can pause the execution of your code at a specific point and examine the state of your application.

To set a breakpoint in IntelliJ IDEA, simply click on the line number where you want to pause execution. A red dot will appear, indicating that a breakpoint has been set. You can also set a conditional breakpoint, which will only pause execution if a certain condition is met.

Once you've set a breakpoint, you can run your application in debug mode by clicking the "Debug" button in the toolbar. When your code reaches the breakpoint, execution will pause and you can examine the state of your application using IntelliJ IDEA's debugging tools.


Watches are another useful tool for debugging your JavaFX application. A watch allows you to monitor the value of a specific variable or expression as your code executes.

To add a watch in IntelliJ IDEA, simply right-click on a variable or expression and select "Add to Watches." The value of the watch will be displayed in the Watches panel, and will update as your code executes.

Evaluate Expression

The Evaluate Expression tool allows you to execute code within the context of your application while it is paused at a breakpoint. This can be useful for testing out small snippets of code or for examining the state of your application in more detail.

To use the Evaluate Expression tool, simply open the Debug tool window and select the "Evaluate Expression" tab. Enter the code you want to execute and click "Evaluate." The result of the expression will be displayed in the tool window.

Debugging JavaFX Scene Graph

One of the unique challenges of debugging JavaFX applications is debugging the scene graph. The scene graph is a hierarchical structure that represents the visual elements of your application, and can be difficult to debug using traditional debugging tools.

IntelliJ IDEA offers a variety of tools for debugging the scene graph, including the Scene Builder tool and the Scene Graph panel. The Scene Builder tool allows you to visually inspect the scene graph and make changes to it, while the Scene Graph panel allows you to view the structure of the scene graph and examine the properties of individual nodes.

Debugging Multithreaded Applications

Multithreaded applications can be particularly challenging to debug, as issues can arise from race conditions and other concurrency-related problems. IntelliJ IDEA offers a variety of tools for debugging multithreaded applications, including the Threads panel and the Suspend All Threads button.

The Threads panel allows you to view all of the threads in your application and examine their state. You can also use the Suspend All Threads button to pause execution of all threads in your application, allowing you to examine the state of your application in more detail.


Debugging JavaFX applications can be a challenging task, but with the right tools and techniques, it can be made much easier. IntelliJ IDEA offers a variety of debugging tools that can help you identify and resolve issues in your JavaFX application, including breakpoints, watches, and the Evaluate Expression tool.

In addition, IntelliJ IDEA offers a variety of tools for debugging the scene graph and multithreaded applications, making it a powerful tool for JavaFX developers. So why wait? Start debugging your JavaFX applications with IntelliJ IDEA today!

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