Internal Working of ConcurrentHashMap and difference with SychronizedMap using working example

In this example we understand why to use a concurrenthashmap as compared to a synchronized map-

[arijitmedya]

This is a great Video, clearly demonstrates the difference between normal HashMap and ConcurrentHashmap. Great Job. Please bring us more of such Videos. Kudos!!!

[AmbujRajput]

Good explanation.
Trick- You can create class just by copy the content of class and paste after clicking on package. No need to create class and then copy the content.

[exploringBees]

Best Part is You referred your website for entire explanation .... Awesome Thanku :)

[dsaisourab]

Very nice explanation !! Thanks alot for the video !!

[aadeshnarvariya]

I was not faced this issue with sychhashmap as you faced .. created the same program as u given but not faced

[nehajain]

Clear and concise explanation. Thank you so much.👍

[ramkrishnadixit]

Hi, Where are you starting the thread in code ? there is no such thread.start method then how come threads are starting. Please present the full code as incomplete code confuse the viewers. Thanks.

[anmolmore]

Another great video.
But, If i use normal 'HashMap' in place of 'SynronisedHashMap' i do not get any 'concurrentModification' exception, every thread works well.
Infact I am not getting any exception using 'synchronisedMap' as well.

[shahidgheti]

Great video, thanks you for such wonderful explanation

[ramyasubramanian]

Thanks for the explanation. When trying to run the synchronised map I am not getting any exception. I am not seeing the threads getting executed parallely. Should I change any settings?

[gulammohammad]

Very nice explanation.... Thanks for this.

[vijayvaswani]

In which case concu..exception be thrown in conc. Hashmap

[kumarabhishek]

Nice turtorial i have one doubt. Why is Null key is not allowed into ConcurrentHashMap

[swordrohit]

correct 4th point on your website...in differences