Nifty GUI Frustrating Error

Troubleshooting gui
1

Hi! I’m new to NiftyGUI… I’ve been reading some things here at jmonkey forum as well as the Nifty Tutorials. I’ve been trying the demo as well… But I can’t seem to understand why it keeps giving me a NullPointer Exception… Here’s a very very very simple code that I’m doing…

[java]TextField textfield = nifty.getScreen(“hud”).findNiftyControl(“countryText”, TextField.class);
System.out.println(textfield.getText());[/java]

and I keep getting this error everytime I try to get something from the textfield

SEVERE: Uncaught exception thrown in Thread[LWJGL Renderer Thread,5,main] java.lang.NullPointerException at de.lessvoid.nifty.controls.label.LabelControl.getTextRenderer(LabelControl.java:61) at de.lessvoid.nifty.controls.label.LabelControl.getText(LabelControl.java:47) at app.main.Main.simpleInitApp(Main.java:88) at com.jme3.app.SimpleApplication.initialize(SimpleApplication.java:225) at com.jme3.system.lwjgl.LwjglAbstractDisplay.initInThread(LwjglAbstractDisplay.java:130) at com.jme3.system.lwjgl.LwjglAbstractDisplay.run(LwjglAbstractDisplay.java:207) at java.lang.Thread.run(Thread.java:662)

Here’s my XML

[java]control height=“26px” id=“countryText” name=“textfield” width=“212px” x=“60” y=“0” maxLength=“20” text=“Some Text”[/java]

I’m also trying to do a setText(“Some Text”) and for some reason it keeps giving me NullPointerException… I’m getting really frustrated and I badly need help… :cry:

2

For some reason the textfield isn’t being found. Make sure you have the right screen name as the nifty control name looks right.

3

It’s really hard to analyze the error trace only having some tiny code snippets.
But I guess the Nullpointer is thrown because your screen is not bound.
I cannot figure out another reason because the Nullpointer occurs in the class LabelControl.
I wonder why it is not the class TextFieldControl instead.
Actually the class LabelControl does not implement the interface TextField.