src/macosx/classes/sun/lwawt/macosx/LWCToolkit.java

*** 906,913 ****
                  : name.substring(0, dot) + "@2x" + name.substring(dot);
          return (slash < 0) ? name2x : path.substring(0, slash + 1) + name2x;
      }
  
      private static boolean isValidPath(String path) {
!         return !path.isEmpty() && !path.endsWith("/") && !path.endsWith(".");
      }
  }
--- 906,916 ----
                  : name.substring(0, dot) + "@2x" + name.substring(dot);
          return (slash < 0) ? name2x : path.substring(0, slash + 1) + name2x;
      }
  
      private static boolean isValidPath(String path) {
!         return path != null &&
!                 !path.isEmpty() &&
!                 !path.endsWith("/") &&
!                 !path.endsWith(".");
      }
  }