synchronized(errCode){
synchronized(retStr){
    public static String normalize( String str,                                     int normalizationMode)                                    throws Exception{         synchronized(errCode){            if(!check(normalizationMode)){                throw ErrorCode.getException(ErrorCode.U_ILLEGAL_ARGUMENT_ERROR);            }            String retStr =  NativeNormalizer.normalize(str,                                                         normalizationMode,                                                         errCode);            if(ErrorCode.isFailure(errCode[0])){                throw ErrorCode.getException(errCode[0]);            }            return retStr;         }                      }