java 将 Object arrayList 对象转换为 Integer

Convert Object arrayList object to Integer

提问by fean

I have created an ArrayList of Object and it contains both Integer and String.

我创建了一个对象的 ArrayList，它包含整数和字符串。

List<Object> arrayList = new ArrayList<>();

Using the below condition I have checked whether it is integer or not

使用以下条件我检查了它是否为整数

if(arrayList.get(indexValue) instanceof Integer){
 // Here how convert the object into integer
}

But the problem is, how can I convert the object into integer ?

但问题是，如何将对象转换为整数？

Thanks

谢谢

回答by Subhrajyoti Majumder

You can explicitly cast it to Integer.

您可以将其显式转换为 Integer。

if(arrayList.get(indexValue) instanceof Integer){
  Integer i = (Integer)arrayList.get(indexValue);
}