Error: the method getId() is undefined for the type List

Question

I have a method to create a list of objects of class

public List initProducts(){
    List product = new ArrayList();         


        

Answer 1

product is reference to List object.

and List/ArrayList has no methosd named getId().

You have written getId() method for Prodct class , so you can call this method using ref to Product class object.

If you want to get any product object form list use get(int index) method of ArrayList.

eg.

Product prod = product.get(0);
String id= prod.getId();