// collections/GenericsAndUpcasting.java

// (c)2017 MindView LLC: see Copyright.txt

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com for more book information.

import java.util.*;

class GrannySmith extends Apple {}

class Gala extends Apple {}

class Fuji extends Apple {}

class Braeburn extends Apple {}

public class GenericsAndUpcasting {

public static void main(String[] args) {

ArrayList<Apple> apples = new ArrayList<>();

apples.add(new GrannySmith());

apples.add(new Gala());

apples.add(new Fuji());

apples.add(new Braeburn());

for(Apple apple : apples)

System.out.println(apple);

}

}

/* Output:

GrannySmith@15db9742

Gala@6d06d69c

Fuji@7852e922

Braeburn@4e25154f

*/