IntelliJ中JavaFX+Gradle项目启动报错：JavaFX runtime components are missing 求助

Hey there! Let's work through fixing your JavaFX + Gradle setup step by step. Based on the configs you shared, here are the key adjustments and checks to get your app running:

1. Fix Missing JavaFX Dependency & Clean Up Module Info #

Looking at your files:

• Your module-info.java declares a dependency on javafx.fxml, but your Gradle build doesn't include this module in dependencies. This will cause runtime errors when the module system can't resolve the dependency.
• requires java.base is redundant—every Java module automatically depends on java.base, so you can remove this line.

Updated module-info.java: #

module com.skb {
    requires javafx.fxml;
    requires javafx.controls;
    requires javafx.graphics;

    opens com.skb;
}

2. Simplify Gradle Configuration with Official JavaFX Plugin #

Your custom getJavaFXPlatform() method uses an internal Gradle API (DefaultNativePlatform), which can break across Gradle versions. Instead, use the official OpenJFX Gradle plugin—it handles platform-specific dependencies automatically, eliminating the need for custom OS detection.

Updated build.gradle: #

plugins {
    id 'application'
    // Use official OpenJFX plugin to manage JavaFX dependencies
    id 'org.openjfx.javafxplugin' version '0.0.10'
}

group 'com.skb'
version '1.0-SNAPSHOT'

repositories {
    mavenCentral()
}

// Configure JavaFX via the plugin
javafx {
    version = "15.0.1"
    modules = ['javafx.controls', 'javafx.fxml', 'javafx.graphics']
}

application {
    mainModule.set('com.skb')
    mainClass.set('com.skb.EditorApp')
}

java {
    modularity.inferModulePath.set(true)
}

3. Verify IntelliJ Run Configuration #

When running modular JavaFX apps with Gradle, always use the Gradle task instead of directly running the EditorApp class:

1. Open the Gradle tool window in IntelliJ (right sidebar).
2. Navigate to Tasks > application > run.
3. Right-click the run task and select "Run" to launch your app.

Directly running the class can cause module path resolution issues, as IntelliJ may not properly inject Gradle-managed dependencies into the module path.

4. Test the Setup #

After making these changes:

1. Click the "Refresh Gradle Project" button in the Gradle tool window to sync your config.
2. Run the application:run task—you should see the "Running..." output in the console if everything works correctly.

内容的提问来源于stack exchange，提问作者Sourav Kannantha B