[Ch10b] Generic methods

package ch10b;

import java.util.ArrayList;

import java.util.List;

public class TestGenerics4 {

  public static void main(String[] args) {

    new TestGenerics4().go();

  }

  public void go() {

    List<Animal> animals = new ArrayList<>();

    animals.add(new Dog());

    animals.add(new Cat());

    animals.add(new Dog());

    takeAnimals(animals);

    List<Dog> dogs = new ArrayList<>();

    dogs.add(new Dog());

    dogs.add(new Dog());

    takeAnimals(dogs);

  }

  public void takeAnimals(List<? extends Animal> animals) {

    for (Animal a : animals) {

      a.eat();

    }

  }

  public <T extends Animal> void takeAnimals2(List<T> animals) {

    for (Animal a : animals) {

      a.eat();

    }

  }

}