I have custom component with layout on FXML file which containts line
<fx:root type="javafx.scene.layout.VBox" spacing="10.0" xmlns:fx="http://javafx.com/fxml">
I create this file on SceneBuilder 1.0, but then i try open this file on SceneBuilder 2.0 i got Exception
java.io.IOException: javafx.fxml.LoadException: Root hasn't been set. Use method setRoot() before load.
/Users/dmitrynelepov/Development/SogazGit/smpb/SMProjectBrownRelease/SMPBProxy/engine/fxml/component_daemon_viewer.fxml:14
Also must to tell: in applications this fxml loadings fine with setting root by code.
In official tutorial (http://docs.oracle.com/javafx/2/fxml_get_started/custom_control.htm) tells:
<fx:root type="javafx.scene.layout.VBox" xmlns:fx="http://javafx.com/fxml">
<TextField fx:id="textField"/>
<Button text="Click Me" onAction="#doSomething"/>
</fx:root>
As u can see Oracle tells:Delete the AnchorPane markup that NetBeans IDE automatically generated.
But it's not working.
UPDATE
SceneBuilder 2.0 Build 7 - the problem persists
JDK8 b117 - the problem persists
Thanks for SceneBuilder developers.
Bug with https://javafx-jira.kenai.com/browse/DTL-5968 has fixed.
And on SceneBuilder 2.0 build 9 - problem was solved.
Question closed.
Not quite fixed for me. I am still getting this error.
java.io.IOException: javafx.fxml.LoadException: Root hasn't been set. Use method setRoot() before load.
/C:/path-to-my-fxml/foo.fxml:11
at com.oracle.javafx.scenebuilder.kit.fxom.FXOMLoader.load(FXOMLoader.java:86)
at com.oracle.javafx.scenebuilder.kit.fxom.FXOMDocument.<init>(FXOMDocument.java:74)
With the latest version of Scenebuilder 2.0 dev release:
Build Information Version: 2.0-b09, Changeset: 12f988d79fe6 Date:
2013-12-19 09:33
Not sure what the workaround is at this point other than to keep on switching the fx:root for a concrete container object. Bummer.
- chooks
来源：https://stackoverflow.com/questions/19972735/javafx-scenebuilder-2-0-doesnt-open-fxml-for-custom-components-with-fxroot-as