I get that error when executing JFrame in which Jpanel is located. Any idea I get why this occurs would be very helpful.
Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: Can not cast javax.swing.JPanel to java.lang.Boolean at java.lang.Class.cast (Class.java:3369) at org.jdesktop.beansbinding.Binding.convertForward (Binding.java:1312) at org.jdesktop.beansbinding.Binding.getSourceValueForTarget (Binding.java:844) at org.jdesktop.beansbinding.Binding.refreshUnmanaged (Binding.java:1222) at org.jdesktop.beansbinding.Binding.refresh (Binding.java:1207) at org.jdesktop.beansbinding.AutoBinding.tryRefreshThenSave (AutoBinding.java:162) at org.jdesktop.beansbinding.AutoBinding.bindImpl (AutoBinding.java:199) at org.jdesktop.beansbinding.Binding.bindUnmanaged (Binding.java:959) at org.jdesktop.beansbinding.Binding.bind (Binding.java:944) at org.jdesktop.beansbinding.BindingGroup.bind (BindingGroup.java:143) at enterprise_systro.VENTA.initComponents (VENTA.java:1437) at enterprise_systro.VENTA. (VENTA.java:33) at enterprise_systro.SALE $ 53.run (SALE.java:2252) at java.awt.event.InvocationEvent.dispatch (InvocationEvent.java:311) at java.awt.EventQueue.dispatchEventImpl (EventQueue.java:756) at java.awt.EventQueue.access $ 500 (EventQueue.java:97) at java.awt.EventQueue $ 3.run (EventQueue.java:709) at java.awt.EventQueue $ 3.run (EventQueue.java:703) at java.security.AccessController.doPrivileged (Native Method) at java.security.ProtectionDomain $ JavaSecurityAccessImpl.doIntersectionPrivilege (ProtectionDomain.java:80) at java.awt.EventQueue.dispatchEvent (EventQueue.java:726) at java.awt.EventDispatchThread.pumpOneEventForFilters (EventDispatchThread.java:201) at java.awt.EventDispatchThread.pumpEventsForFilter (EventDispatchThread.java:116) at java.awt.EventDispatchThread.pumpEventsForHierarchy (EventDispatchThread.java:105) at java.awt.EventDispatchThread.pumpEvents (EventDispatchThread.java:101) at java.awt.EventDispatchThread.pumpEvents (EventDispatchThread.java:93) at java.awt.EventDispatchThread.run (EventDispatchThread.java:82)