src/java.desktop/share/classes/com/sun/java/swing/plaf/motif/MotifPopupMenuUI.java

@@ -105,10 +105,11 @@
         return new ChangeListener() {
             public void stateChanged(ChangeEvent e) {}
         };
     }
 
+    @SuppressWarnings("deprecation")
     public boolean isPopupTrigger(MouseEvent e) {
         return ((e.getID()==MouseEvent.MOUSE_PRESSED)
                 && ((e.getModifiers() & MouseEvent.BUTTON3_MASK)!=0));
     }
 }