14.10 Map Interface in Java Collection Framework

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[Filkk]

Way better than my teacher at my school. Thank you so much!

[prakharawasthi]

That use of MULTIPLE inheritance at 4:20 with word "You" :D

[jvsnyc]

ConcurrentHashMap<> is better for a lot of things than HashTable<> if you are actually writing multi-threaded code. Of course, if you are getting parallelism "for free" from Streams and Collectors you don't need either, Streams handles that by itself without needing either of their mechanisms...

[SureshBabu]

Clearly understood by seeing your lectures.. thanks a lot.

[vladanulardzic]

Excellent (as always) ! Keep on ! Thank you.

[aniketgarg]

Your videos are so simple and yet so Informative. Thanks a lot Sir!

[nareshpendem]

I like your lectures, but infact reason for going away from ArrayList to Map is not coz index is dealing with numbers, but fact is index number will changes based on additions or deletions from ArrayList, unlike HashMap..

[AbhishekKumar-fnsz]

I was struggling.. Thnk u for the ease

[krishnaforu]

Sir... Please make a video on sorting hashmap based on 1) keys, 2) values... Using Collection.sort!!! It's really annoying watching this concept from other channels

[jkk-gc]

You don't really need to create another set to store keys. Just use
for(String key : map.keySet()){
}

[Superb_virg]

is there a reason you used the polymorphic implementation: Map map = new HashTable();
instead of: HashMap map = new HashMap(); ??

[FitLife]

map.values().forEach(a -> {
System.out.println(a);
});




if you coming from JAVASCRIPT u would

[ravindranaik]

Sir u r first video u said hasmap is synchronised and thread safe..in this video u said opposite means hasmap is notsynchronised and not thead safe..plz check and clarify the doubts.

[manasranjan]

You told list and set allows index no...but in set indexing is not allow rather object are stored in hashing

[achin]

sir i beg you please tell more about EJB.How to do Transactions in EJB in Eclipse also also how to implement Java beans i am not able to understand:((

[divyasrivastava]

sir after using set it is still not in sequence

[adarshmohan]

If the key is a account number and the value can be multiple ...?

[makemoneyeasier]

what is the advantage of map over arraylist. we can access any value by index number in arraylist similar to keys in maps .please suggest something .

[aadid]

how do I get key when I know the value of that particular key??

[universalstarcreations]

Can we use values as integer, char, float.. or should it only be string in maps?