Solved: setting up javafx in eclipse vm argument

setting up in eclipse vm argument In this article, we will tackle the issue of setting up VM arguments in the popular Java Integrated Development Environment (IDE) called Eclipse. Many developers face challenges when trying to configure the settings of a Java application for optimal performance and make use of the Eclipse’s powerful features. We will explain why configuring VM arguments is essential and provide a step-by-step guide to set up and use them effectively in your projects.

VM arguments play a crucial role in the performance and configuration of Java applications as they allow the developer to set custom settings for the Java Virtual Machine (JVM). Configuring the VM arguments in a correct way can improve the performance of your application and provide you with more flexibility during development. In this article, we will provide a simple yet comprehensive guide on how to properly set up VM arguments in Eclipse, and discuss some of the key libraries and functions involved in this process.

Setting Up VM Arguments in Eclipse IDE

To configure VM arguments in Eclipse, follow these steps:

  1. Open your Java project in Eclipse.
  2. Right-click on the main class or the class containing the main method, and click “Run As” > “Run Configurations”.
  3. In the Run Configurations window, on the “Arguments” tab, you will find a section named “VM arguments”.
  4. Enter the VM arguments you desire to apply to your application. Each argument should be preceded by a dash (-).
  5. Click on “Apply” and then “Run” to start your application with the applied VM arguments.

Here’s an example of utilizing VM arguments:

public class HelloWorld {
    public static void main(String[] args) {
        System.out.println("Hello, world!"); 

In this simple example, we may want to increase the maximum heap size of the JVM by setting the “-Xmx” VM argument. To set the maximum heap size to 512MB, you would enter “-Xmx512m” in the “VM arguments” section.

Keep in mind that the provided VM arguments will only apply to the specific run configuration you are editing. To make it persistent across multiple run configurations, you will need to edit the default run configuration or apply the changes to all other necessary configurations.

Commonly Used Libraries and Functions

There are numerous VM arguments that can be used in Java applications, some related to performance optimization, debugging, or configuring specific features. A few popular and widely used VM arguments include:

  • -Xmx: Sets the maximum heap size of the JVM.
  • -Xms: Specifies the initial heap size.
  • -Xss: Sets the thread stack size.
  • -XX:PermSize: Specifies the initial PermGen size (Java 7 and older).
  • -XX:MaxPermSize: Sets the maximum PermGen size (Java 7 and older).
  • -XX:+HeapDumpOnOutOfMemoryError: Creates a heap dump file when an OutOfMemoryError is thrown.
  • -XX:HeapDumpPath: Specifies the path for the heap dump file.

These arguments are just a small subset of available VM arguments, but they exemplify the possibilities in configuring your JVM in different scenarios. Understanding how to use these arguments effectively will significantly improve your Java application development experience.


In summary, setting up VM arguments in Eclipse is a vital skill for Java developers, as it grants flexibility during application development and provides better control over the JVM settings. This article presented a step-by-step guide on configuring VM arguments in Eclipse and discussed some of the most popular arguments used in Java development. By making use of these arguments, developers can potentially gain performance improvements, debug and profile applications more efficiently, and tailor the JVM settings according to their specific needs.

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