// No return value for this function. static void getFormals(SamTokenizer f) throws TokenizerException { try { // The only type for formals is int. myCheck(f, "int"); String paramName = f.getWord(); // Check if the name already exists. if (symTables.lastElement().containsKey(paramName)) throw new TokenizerException("Error: Duplicate declaration of " + paramName + "."); params.add(paramName); if (f.check(',')) { getFormals(f); } return; } catch (Exception e) { System.out.println(e.getMessage()); throw new TokenizerException("Error: Invalid formals"); } }