29 lines
749 B
Java
29 lines
749 B
Java
// collections/GenericsAndUpcasting.java
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// (c)2017 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://OnJava8.com for more book information.
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import java.util.*;
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class GrannySmith extends Apple {}
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class Gala extends Apple {}
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class Fuji extends Apple {}
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class Braeburn extends Apple {}
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public class GenericsAndUpcasting {
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public static void main(String[] args) {
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ArrayList<Apple> apples = new ArrayList<>();
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apples.add(new GrannySmith());
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apples.add(new Gala());
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apples.add(new Fuji());
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apples.add(new Braeburn());
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for(Apple apple : apples)
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System.out.println(apple);
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}
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}
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/* Output:
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GrannySmith@15db9742
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Gala@6d06d69c
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Fuji@7852e922
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Braeburn@4e25154f
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*/
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