of5_2 lf

foreksempel/src/main/java/of5_2/lf/Farm.java

+package of5_2.lf;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Iterator;
+import java.util.List;
+
+
+public class Farm implements Iterable<Animal>{
+
+    private List<Animal> animals = new ArrayList<>();
+
+    public void addAnimal(Animal animal){
+        if(animals.contains(animal)){
+            throw new IllegalArgumentException("Animal already added");
+
+        }
+        animals.add(animal);
+    }
+
+    
+    public List<Animal> getAnimals(){
+        return new ArrayList<>(animals);
+    }
+
+    public int numberOfAnimals(){
+        return this.animals.size();
+    }
+
+    public Animal getAnimal(int index){
+        return animals.get(index);
+    }
+
+    @Override
+    public Iterator<Animal> iterator() {
+        return this.animals.iterator();
+    }
+
+    public List<String> getAnimalNames(){
+        return this.animals.stream()
+            .map((animal) -> animal
+            .getName())
+            .distinct()
+            .toList();
+    }
+
+    public static void main(String[] args) {
+        Dog Ludo = new Dog("Ludo", 2);
+        Chicken Albert = new Chicken("Albert", 1);
+        Dog Ollie = new Dog("Ollie", 6);
+        Dog Buddy = new Dog("Buddy", 8);
+        Chicken Ringo = new Chicken("Ringo", 6);
+        Chicken Kjell = new Chicken("Kjell", 5);
+
+        List<Animal> animals = new ArrayList<>(List.of(
+            Ludo, Albert, Ollie, Buddy, Ringo, Kjell
+            ));
+
+        Farm farm = new Farm();
+        farm.addAnimal(animals.get(0));
+        farm.addAnimal(animals.get(1));
+        farm.addAnimal(animals.get(2));
+        farm.addAnimal(animals.get(3));
+        farm.addAnimal(animals.get(4));
+        farm.addAnimal(animals.get(5));
+
+
+        //Oppgave 1
+        /* Collections.sort(animals);
+
+        for (Animal animal : animals){
+            System.out.println(""+animal.getName()+" "+ animal.getAge() + " " + animal.makeSound());
+
+        } */
+
+
+        /* 
+
+        //Oppgave 2
+        for (Animal animal : farm){
+            System.out.println(animal.makeSound());
+        } */
+
+        //Oppgave 3
+        /* Iterator<Animal> iterator  = new YoungAnimalsIterator(farm);
+        while(iterator.hasNext()){
+            System.out.println(iterator.next().makeSound());
+
+        } */
+
+
+        //Oppgave 4
+        /* Iterator<Animal> iterator = new FilterAnimalsIterator(farm, new DogPredicate());
+        while (iterator.hasNext()) {
+            System.out.println(iterator.next().makeSound());
+        } */
+
+
+        //Oppgave 5
+        /* Iterator<Animal> iterator = new FilterAnimalsIterator(farm, (p -> p.getAge()<=2));
+        while (iterator.hasNext()) {
+            System.out.println(iterator.next().makeSound());
+        } */
+
+        //Oppgave 6
+        /* Collections.sort(animals, (animal1, animal2) -> animal1.getName().compareTo(animal2.getName()));
+        for (Animal animal : animals){
+            System.out.println(animal.makeSound());
+        } */
+
+        //Oppgave 7
+        /* animals.add(new Dog("Ludo",8)); */
+
+        //Oppgave 8
+        /* Iterator<Animal> iterator = new FilterAnimalsIterator(farm, (p -> p.getAge()<=2));
+        while (iterator.hasNext()) {
+            System.out.println(iterator.next().makeSound());
+
+        farm.getAnimals().stream()
+            .filter(new DogPredicate())
+            .forEach(animal -> {
+                System.out.println(animal.makeSound());}
+            ); */
+        
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+    }
+
+}