类型不匹配:无法从对象转换为列表 [英] Type mismatch: cannot convert from Object to List

问题描述

 CompanyDAO companyDAO = new CompanyDAO();
 List companyList = companyDAO.getAllCompanyList();

MycompanyList 包含这样的数据:

MycompanyList contains a data of like this :

 [[1, Agastha Medical Center], [2, Agastha Asthma]]

现在我想迭代这些值，我想将值 1 传递给查询，但是当我将它放在 for 循环中时，我得到了

Now i want to iterate the values and i want to pass a value of 1 to query but when i am placing this inside of a for loop i am getting

for(int k=0;k<=companyList.size();k++){

List companyId =companyList.get(k);  //  [1, Agastha Medical Center]  for k=0;

Type mismatch: cannot convert from Object to List

我需要在 for 循环中单独读取 1 的值，我该怎么做?

I need to read value of 1 alone inside of for loop how can i do this ?

推荐答案

you have to type cast the list

you have to type cast the list

for(int k=0;k<=companyList.size();k++){

List companyId =(List)companyList.get(k);

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