OnJava8-Examples/generics/DogsAndRobots.java at master · CSapprenticeWT/OnJava8-Examples · GitHub

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// generics/DogsAndRobots.java

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

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

// No (direct) latent typing in Java

import reflection.pets.*;

class PerformingDog extends Dog implements Performs {

@Override

public void speak() { System.out.println("Woof!"); }

@Override

public void sit() { System.out.println("Sitting"); }

public void reproduce() {}

}

class Robot implements Performs {

@Override

public void speak() { System.out.println("Click!"); }

@Override

public void sit() { System.out.println("Clank!"); }

public void oilChange() {}

}

class Communicate {

public static <T extends Performs>

void perform(T performer) {

performer.speak();

performer.sit();

}

public class DogsAndRobots {

public static void main(String[] args) {

Communicate.perform(new PerformingDog());

Communicate.perform(new Robot());

}

/* Output:

Woof!

Sitting

Click!

Clank!