public class CustomCollection<E> implements Collection<E> { private List<E> elements = new ArrayList<>(); @Override public int size() { return elements.size(); } @Override public boolean isEmpty() { return elements.isEmpty(); } @Override public boolean contains(Object o) { return elements.contains(o); } @Override public Iterator<E> iterator() { return elements.iterator(); } @Override public Object[] toArray() { return elements.toArray(); } @Override public <T> T[] toArray(T[] a) { return elements.toArray(a); } @Override public boolean add(E e) { return elements.add(e); } @Override public boolean remove(Object o) { return elements.remove(o); } @Override public boolean containsAll(Collection<?> c) { return elements.containsAll(c); } @Override public boolean addAll(Collection<? extends E> c) { return elements.addAll(c); } @Override public boolean removeAll(Collection<?> c) { return elements.removeAll(c); } @Override public boolean retainAll(Collection<?> c) { return elements.retainAll(c); } @Override public void clear() { elements.clear(); } } CustomCollection<String> collection = new CustomCollection<>(); collection.add("Element 1"); collection.add("Element 2");


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