Re: Getting java.lang.IllegalStateException: This must happen in the event thread!, when disabling an action

Because you are not doing that in the event thread. See
https://docs.oracle.com/javase/tutorial/uiswing/concurrency/dispatch.html

Try putting that in an EventQueue.invokeLater.


--emi

On Thu, Oct 27, 2016 at 4:14 PM, kmilito <[email protected]> wrote:

> I am trying to disable an action outside actionPerformed(ActionEvent e) by
> using action.setEnabled(false), but I get the following error:
>
>
> Code:
> java.lang.IllegalStateException: This must happen in the event thread!
>     at org.openide.awt.Actions$Bridge.propertyChange(Actions.java:929)
>     at org.openide.util.WeakListenerImpl$PropertyChange.propertyChange(
> WeakListenerImpl.java:197)
>     at java.beans.PropertyChangeSupport.fire(PropertyChangeSupport.java:
> 335)
>     at java.beans.PropertyChangeSupport.firePropertyChange(
> PropertyChangeSupport.java:327)
>     at javax.swing.event.SwingPropertyChangeSupport.firePropertyChange(
> SwingPropertyChangeSupport.java:92)
>     at java.beans.PropertyChangeSupport.firePropertyChange(
> PropertyChangeSupport.java:263)
>     at javax.swing.AbstractAction.firePropertyChange(
> AbstractAction.java:276)
>     at javax.swing.AbstractAction.setEnabled(AbstractAction.java:236)
>
>
>
> Any ideas what I am getting this error?
>
>
>
>
>