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// collections/GenericsAndUpcasting.java

// (c)2021 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@19e0bfd

Gala@139a55

Fuji@1db9742

Braeburn@106d69c

*/