7d49730b_ramework_Tutorial___JournalDev__Properties
[Collection] Null Element [ArrayList] Yes [LinkedList] Yes [HashSet] Yes [TreeSet] No [HashMap] Yes [TreeMap] No [Vector] Yes [Hashtable] No [Stack] Yes [CopyOnWriteArrayList] Yes [ConcurrentHashMap] No [CopyOnWriteArraySet] Yes [Properties] 
No
N o
Y e s
Java Collections Framework Tutorial | JournalDev
Properties