#Collections_Difference

Question count - 0     Last updated    - V3 (24-Jul-2024)

Duplicate Insertion order Sorted by natural order Synchronized Null elements Iterator ArrayList Yes Yes Yes Fail-fast LinkedList Yes Yes Yes Fail-fast CopyOnWriteArrayList Yes Yes Yes Yes Fail-safe HashSet Yes Fail-fast LinkedHashSet Yes Yes Fail-fast TreeSet Yes No Fail-fast ConcurrentSkipListSet Yes Yes No Fail-safe HashMap 1 null key & many null values Fail-fast Hashtable Yes No Fail-fast ConcurrentHashMap Yes No Fail-safe TreeMap Yes Null key not allowed, Allow many null values Fail-fast ConcurrentSkipListMap Yes Yes No Fail-safe