Goto the netbeans screen as per the attached image .Select the 
A11y tool generates the results with the following error 
Doesn't implement Accessible :

Doesn't implement Accessible :
   Class: org.openide.explorer.propertysheet.ButtonPanel {  } 


 No Accessible name :
   Class: org.openide.explorer.propertysheet.ButtonPanel$ConditionallyFocusableButton {  |  } 
   Class: org.openide.explorer.propertysheet.StringInplaceEditor {  |  } 


 No Accessible description :
   Class: org.openide.explorer.propertysheet.ButtonPanel$ConditionallyFocusableButton {  |  } 
   Class: org.openide.explorer.propertysheet.StringInplaceEditor {  |  } 


 Label with LABEL_FOR not set :
   - none.

 Components with no LABEL_FOR pointing to it :
   Class: org.openide.explorer.propertysheet.SheetTable {  Properties table |  Table of editable properties representing
the current object } 
   Class: org.openide.explorer.propertysheet.StringInplaceEditor {  |  } 


 Components with no mnemonic :
   Class: org.openide.explorer.propertysheet.ButtonPanel$ConditionallyFocusableButton {  |  } 


 Components with wrong mnemonic (mnemonic isn't ASCII , label doesn't contain mnemonic):
   - none.

 Components not reachable with tab traversal :
   Class: org.openide.explorer.propertysheet.ButtonPanel {  } 
   Class: org.openide.explorer.propertysheet.ButtonPanel$ConditionallyFocusableButton {  |  } 
   Class: org.openide.explorer.propertysheet.SheetTable {  Properties table |  Table of editable properties representing
the current object } 
   Class: org.openide.explorer.propertysheet.StringInplaceEditor {  |  }