Get type of generic type inside a List in Java

Question

I have the below function:

    public  void putList(String key, List lst){
          if (T instanceof String) {
          // Do something              


        

Answer 1

You can not find the type of T as the type information is erased. Check this for more details. But if the list is not empty, you can get an element from the list and can find out using instanceof and if else