42 lines
993 B
Java
42 lines
993 B
Java
// generics/DogsAndRobots.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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// No (direct) latent typing in Java
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import typeinfo.pets.*;
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class PerformingDog extends Dog implements Performs {
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@Override
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public void speak() { System.out.println("Woof!"); }
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@Override
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public void sit() { System.out.println("Sitting"); }
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public void reproduce() {}
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}
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class Robot implements Performs {
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public void speak() { System.out.println("Click!"); }
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public void sit() { System.out.println("Clank!"); }
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public void oilChange() {}
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}
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class Communicate {
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public static <T extends Performs>
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void perform(T performer) {
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performer.speak();
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performer.sit();
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}
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}
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public class DogsAndRobots {
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public static void main(String[] args) {
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Communicate.perform(new PerformingDog());
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Communicate.perform(new Robot());
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}
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}
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/* Output:
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Woof!
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Sitting
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Click!
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Clank!
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*/
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