simple-javafx-project/nbactions.xml

<?xml version="1.0" encoding="UTF-8"?>
    <actions>
        <action>
            <actionName>run</actionName>
            <packagings>
                <packaging>jar</packaging>
            </packagings>
            <goals>
                <goal>clean</goal>
                <goal>javafx:run</goal>
            </goals>
        </action>
    </actions>