Question

I have a class Gerbil that I use to test my code. In main I want to make an array of type Gerbil and then perform some operations on it starting with creating a sublist from the main list of objects. Here’s my code:

import java.awt.List;
import java.util.ArrayList;

public class HelloWorld {

    public static void main(String[] args) {
        List<Gerbil> hs = new ArrayList<Gerbil>();
        for(int i = 0; i<10; i++){
            hs.add(new Gerbil(i));
        }
        for(Gerbil i : hs) {
            i.hop();
        }

    }
}

I get error for List<Gerbil> saying that The type List is ont of generic type... I understand the meaning of the error but that makes me wonder what is the right way to do this?

Answer 1

You need to use java.util.List from the Collections API:

import java.util.List;