Define custom typed collection class

Question

Hi, I would like to define a custom typed collection class that can hold multiple type elements, to be more concrete, i have a class defined as
public class MyList extends ArrayList{
public class TestMyList{
    MyList<MyDataTypeOne> listOne; // i want to use JAVA generics here, but it wont let me
    MyList<MyDataTypeTwo> listTwo;
}and i got an error saying: "MyList" does not have typed parameters.
I understand that i need to declare my class as something like
public class MyList<MyDataTypeOne> extends ArrayList
but i dont want it to be restricted to <MyDataTypeOne> but multiple types, just like ArrayList. How can i cope with this please, thanks!

Answer 1

Test the following code:
import java.util.ArrayList;
public class MyList<E> extends ArrayList<E>{
     public MyList()
     public static void main(String[] args) {
          MyList<String> lista = new MyList<String>();
          lista.add("Bolivia");
          String x = lista.get(0);
          System.out.println(x);
}