Java.Collections.Arrange the following interfaces in a hierarchy: List, Set, Map, SortedSet, SortedMap, Collection, Iterable, Iterator, NavigableSet, NavigableMap.

Here’s the hierarchical structure of the given Java Collections Framework (JCF) interfaces:

                 ┌───────────────────┐
                 │    Iterable<E>     │   (Superinterface for collection iteration)
                 └────────▲──────────┘
                          │
                 ┌────────┴────────┐
                 │ Collection<E>   │   (Root interface for List & Set)
                 └────────▲────────┘
                          │
         ┌───────────────┴───────────────┐
         │                               │
      List<E>                          Set<E>  
         │                               │
         │                               ├───────────┐
         │                               │           │
         │                           SortedSet<E>  (Sorted set)
         │                               │
         │                               ▼
         │                         NavigableSet<E>  (Extended SortedSet)
         │
         ▼
   (Implementations: ArrayList, LinkedList, Vector, Stack)

──────────────────────────────────────────────────────────────────
                        Map<K, V>  (Separate hierarchy)
                            │
                            ├──────────────┐
                            │              │
                      SortedMap<K, V>  (Sorted key-value pairs)
                            │
                            ▼
                     NavigableMap<K, V>  (Extended SortedMap)

──────────────────────────────────────────────────────────────────
                 Iterator<E> (Independent interface for iteration)

Explanation of the Hierarchy:

1. Iterable<E> (Superinterface for iteration)

• The topmost interface that allows any class to be iterated using a loop (for-each loop).
• Implemented by Collection<E>, which means all lists and sets are iterable.

2. Collection<E> (Base Interface for List & Set)

• Defines general methods for adding, removing, and checking elements.
• Implemented by List<E> and Set<E>.

3. List<E> (Ordered Collection)

• Maintains insertion order and allows duplicate elements.
• Common Implementations: ArrayList, LinkedList, Vector, Stack.

4. Set<E> (Unique Collection)

• No duplicate elements allowed.
• HashSet, LinkedHashSet, TreeSet are common implementations.

5. SortedSet<E> (Sorted Set)

• Extends Set<E>, ensures sorted elements.
• Implementation: TreeSet.

6. NavigableSet<E> (Enhanced SortedSet)

• Extends SortedSet, adds methods like floor(), ceiling(), higher(), lower() for navigation.
• Implementation: TreeSet.

7. Map<K, V> (Separate Key-Value Collection)

• Stores elements as key-value pairs.
• Implementations: HashMap, LinkedHashMap, Hashtable.

8. SortedMap<K, V> (Sorted Map)

• Extends Map<K, V>, stores keys in sorted order.
• Implementation: TreeMap.

9. NavigableMap<K, V> (Enhanced SortedMap)

• Extends SortedMap<K, V>, adds navigation methods (floorKey(), ceilingKey(), etc.).
• Implementation: TreeMap.

10. Iterator<E> (Independent Interface)

• Provides methods to iterate over collections (hasNext(), next(), remove()).
• Used by all collections that implement Iterable<E>.

Key Takeaways

• Iterable<E> → Root interface for all collections that can be iterated (for-each loop).
• Collection<E> → Parent of List and Set, but Map<K, V> is separate.
• SortedSet<E> & SortedMap<K, V> → Guarantee sorting.
• NavigableSet<E> & NavigableMap<K, V> → Add navigation methods.
• Iterator<E> is an independent interface for iterating over collections.