private boolean checkSetDictionaryArrayIndexOutOfBoundsException(Compressor compressor) {
   try {
     compressor.setDictionary(new byte[] {(byte) 0}, 0, -1);
   } catch (ArrayIndexOutOfBoundsException e) {
     return true;
   } catch (Exception e) {
   }
   return false;
 }
 private boolean checkSetDictionaryNullPointerException(Compressor compressor) {
   try {
     compressor.setDictionary(null, 0, 1);
   } catch (NullPointerException ex) {
     return true;
   } catch (Exception ex) {
   }
   return false;
 }