[对象（Object）类型](%E5%AF%B9%E8%B1%A1%EF%BC%88Object%EF%BC%89%E7%B1%BB%E5%9E%8B.md) [字符串（String）类型](%E5%AD%97%E7%AC%A6%E4%B8%B2%EF%BC%88String%EF%BC%89%E7%B1%BB%E5%9E%8B.md)