SequencedMap Arayüzü - Java 21 İle Geliyor

Giriş

Arayüz şöyle. LinkedHashMap, SortedMap  artık SequencedMap arayüzünden kalıtıyor

interface SequencedMap<K,V> extends Map<K,V> {

    // new methods
    SequencedMap<K,V> reversed();
    SequencedSet<K> sequencedKeySet();
    SequencedCollection<V> sequencedValues();
    SequencedSet<Entry<K,V>> sequencedEntrySet();
    V putFirst(K, V);
    V putLast(K, V);
    // methods promoted from NavigableMap
    Entry<K, V> firstEntry();
    Entry<K, V> lastEntry();
    Entry<K, V> pollFirstEntry();
    Entry<K, V> pollLastEntry();
}