Thank you very much for your kind words ! :-)

I am happy that my tutorials were helpful to you over the years!! :-)

You are welcome 😊

Thank you very much !! 😊😊😊

Thank you very much for your kind words ! :-)

agreed

Thanks a lot !! 😊

You are welcome! :-)

Thank you very much! :-) ... I am happy the video series is helpful! :-)

Than you very much !! 😊😊😊

Thank you very much for your kind comment ! :-) I am happy that my tutorials - and now videos - have been helpful for you :-) ... and good luck in the US !! :-) I am trying to keep up the work, but it takes a lot of time to make the videos and tutorials to a high enough quality. But I get some new material out continuously :-)

I do too. Actually, all these small details is why I stayed with Java and not switched to Scala or Kotlin. I feel like I have greater control in Java over performance sensitive stuff.

Great! Glad it helped ! :-)

Thank you very much !! 😊 One more video coming out soon in the playlist !! 😊

Thank you :-) ... There are definitely Java developers out there with a deeper understanding, such as Brian Goetz (author of Java Concurrency in Practice) and others ! I only supplement these experts - with perhaps a different way of presenting the same ideas :-)

Java Concurrency in Practice is definitely the bible. Unfortunately it's a bit older so the newer Java additions or virtual threads are not part of the book

Thanks ! :-) ... I have planned a good list of videos more - on Java Concurrency.

Thanks :-) ... I am quite happy with the number of views so far :-) Yes, it's not like some of those big channels, but I am also not doing KZfaq as a job - just as a hobby. I like playing with new media and tech, and KZfaq keeps evolving, so it's interesting to be here just to see what it can do.

You are welcome! :-)

You are welcome! :-)

Thanks a lot ! :-)

You are welcome ! ... and thank you for your praise ! :-)

Thank you very much ! Glad you liked it ! :-)

@@JakobJenkov yeah, thank you. I now got a clear understanding only need abit of code to see how it's actually done. Also concepts like race conditions

Thank you ! :-)

You are welcome! ... I am happy my tutorials are helpful for you! ... and thank you for taking the time to tell me! :-)

You are welcome :-)

Great! Glad to hear it ! :-)

Thank you! :-) ... watch the whole playlist too! (see description below the video) :-)

Great to hear! :-)

Thank you very much! :-) ... yes, making videos "interesting" is harder than with text! I realize that sometimes it would be nice with nicer visuals, animations and even music etc. but it's hard to find a style where all the animations etc. do not become disturbing after a while!

​@@JakobJenkov Try motion canvas or manima !!

Thanks - next planned video is also going to be in this playlist :-)

@@JakobJenkov can u please come up with concurrent collections video playlist.. Thanks again

Great ! Thanks ! :-)

Thanks ! :-)

Thank you very much! :-)

Thanks :-)

Great, thanks :-)

Great - I have more videos about Java Concurrency coming soon! :-)

My new web server was unstable - and might still be. I am currently experimenting a bit to find out what the problem is. Hopefully I find the problem sooner or later !

You are most welcome!

You are welcome! :-)

Thank you very much for your kind words :-) I am glad my video helped you!

Great ! - glad it was helpful!

Thanks :-)

Thanks 😊

Thanks! :-)

Thank you 😊

You're very welcome! :-)

The video never claims that two threads can do IO at the same time. The video claims, that when one thread is processing the data it just loaded via IO, another thread can do IO. That is something different than what you write.

8:58 to 9:18 - you mentioned that two threads can do IO at the same time

@@JakobJenkov Now I am a bit confused. At 8:58 to 9:18, you claimed that two threads can do IO at the same time. This seems to contradict your recent statement that only one thread does IO while the other processes the data. Could you please clarify this point? I appreciate your help in understanding this better.

Thank you ! ... What exactly do you mean by "resolve the blocked thread" ?

@@JakobJenkov ​ @Jakob Jenkov I have a thread dump of an application, lets say 100 threads and out of 100 threads 97 threads running properly and 3 threads are in blocked state. As 3 threads are blocked due to this my application not working properly(request not get completed). I need to make these blocked threads to running state. so that 100 threads should be either in running or ready state but should not be in blocked state.

Thank you :-)

Thank you! :-)

You are welcome ! Glad you liked it! :-) Did you watch the whole Java Concurrency playlist?

You are welcome :-)

Thanks! 😃

Thank you - very much :-)

Thanks a lot! :-)

You are welcome! :-)

Thank you 😁

Thanks! :-) ... I will try keep it up :-)

You are welcome - glad you liked it! :-)

You are welcome :-)

Glad you liked it!

Thank you :-)

I am happy you feel like that :-) ... it takes some energy to produce this content, so I am always happy when viewers get value out of it :-)

You could say that - but there are (or can be) some subtle differences. Threads may share memory. OS processes (tasks) usually don't.

@@JakobJenkov Thank you Jenkov)

Hi Matus, I don't know Python well enough at this point to say what the difference between Java threads and Python threads are, unfortunately.

Thanks :-)

A file read is not executed by the CPU but by the hard disk and memory management hardware. While this is going on, the CPU is idle, waiting for the data to appear in memory.

Thanks! :-)

Been waiting for Java Concurrency videos?

You are welcome! :-)

Down at the hardware level, IO operations typically use different hardware than the CPU. That is typically hardware such as the PCIe bus, SATA bus, the hard disk or network card, and then possibly the memory manager when data is copied from the network card or disk into memory (but I am not 100% sure about the last one). That means, that the CPU can be doing other things while the other hardware components serve the IO operations. Sometimes the CPU might be needed a bit for an IO operation down at the operating system level. For instance, it is the operating system that knows what type of file system you have on a harddisk. Thus, when you ask to load a file, the operating system need to translate that into IO operations on the disk. But during the disk IO operations the CPU can do something else.

Multithreading in Java is often used in e.g. Java web servers - but also in other types of server software (e.g. a game server) . Multithreading can also be used inside Java GUI applications, e.g. inside a JavaFX application.

Hi Amit, no, unfortunately I don't have any in-person classes of any kind, right now. It requires a reasonable amount of space, and that's not cheap! I have been thinking about doing something online, though. But I am not yet sure what the form should be. Discord. StreamYard. Shows with guests. I don't know. Something like that :-)

You are welcome! Great to hear! Thanks! :-)

Thank you very much! :-)

You are welcome :-)

Wow! Nice CPU! I'd like to have such a CPU :-D ... I think I have 4 cores / 8 threads in my ooold laptop, and 8 cores / 16 threads in my new work laptop. Yes, you *especially* need to use multithreading to use all those cores and threads! If you just use single-threading then you will only use one of the hardware threads, and the rest will be idle (=> being used for whatever else your computer is doing).

@@JakobJenkov Huge fan of you sir! So happy to get a reply from you. You certainly deserve that CPU, so you can make more awesome tutorials :-). Your tutorials made me meet several office deadlines, and get a raise. Thanks for the info on multithreading. I will then go through the Multithreading tutorials from your channel. It is my weak point in Java.

Thank you ! 😊😊

Task switching only speeds up task execution if the task uses IO, where the CPU is idle while waiting to read or write data to disk or network. During that idle time the CPU can switch to other tasks instead of wasting that CPU time.

​@@JakobJenkovthanks

I am not sure what the exact definition of "multi-processing" is.

Thank you very much ! :-)

Thank you :-)

A CPU can only affect what is going on inside the computer. When downloading - the speed is determined by external factors such as network speed and the speed of routers in between your computer and the server you are downloading from - as well as the network speed and traffic load of the server you download from.

Oooh... you are stepping into the complex world of concurrency :-) ... Yes, the simplest thing for you would be to split the logic of your app into two threads. The main thread that controls the UI should not loop. It should not block. Yes, it's better to have a thread in the background which communicates with the UI thread. Your background thread can run in a loop which checks a BlockingQueue for new "messages" (objects) from the UI thread to which it should respond. If the background thread needs to do other things in its loop than process the messages from the UI thread, then the background thread should not "block" when checking for messages in the BlockingQueue. If no messages are found, it should continue through the rest of that iteration of loop, and then loop to the next iteration of the loop, where it again checks for new messages etc.

You are most welcome :-)

Well, I just added a video to it today :-) There are still topics to add to this playlist, but I will probably be making videos about other topics than Java Concurrency too, for a while.

:-D ... I will try 😉

As close to "in order" as I have been able to make it. But - some of the topics are independent, so you can watch them out of order.

@@JakobJenkov Thank you sir, 😁

Yup 😊

Thanks 😁

It most definitely is - and with the soon-to-come GPU programming APIs for Java, parallelism in Java is about to go to a whole new level :-)

Thanks! Glad you liked it! :-)