7:00 lambda 7:26 backward compatibility of Java 8:18 9:34 why Java 8 is backed by single abstract method interfaces (@FunctionalInterface) 9:47 if an interface is single abstract method interface, you can use lambdas instead of anonymous inner classes 11:47 how does it work under the hood 12:49 illusion aobut lambda - syntax sugar, i.e. on the instruciton level, it is the same as anonymous inner class 14:16 what lambda does under the hood 14:47 what would the compiler be doing with lots of lambda (assumption only) * 18:16 why it is not a good idea for lambdas to create extra classes like anonymous inner classes 19:14 a new feature since Java 7 - instruction - invokedynamic 20:53 in Java 8 struggling with the elimination of anonymous inner classes 21:00 the motivation: use invokedynamic to implement lambda expressions 25:16 example 29:18 internal iterator 39:00 method reference 44:28 avoid the urge of writing a large lambda expression - an anti-pattern 44:54 what are method references 45:41 examples of method references 47:15 static method reference 49:31 parameter as a target map(String::toString) 54:58 2 arguments * 56:23 the order of the arguments are important 57:38 another example - first parameter is the target, second parameter is the argument 59:33 limitations of method reference 1:08:00 filter 1:19:30 second part 1:29:07 stream is an abstraction 1:29:12 a stream is not a physical object with data 1:29:24 a stream is a bunch of functions you will evaluate eventually. There is no data sitting in a stream 1:29:48 a stream is a non mutating pipeline - stream is not mutating the data in a collection 1:30:31 stream functions 1:33:11 transforming function - Stream.map 1:37:25 Stream.reduce() 1:43:47 InStream/DoubleStream.sum() - also a reduction operation 1:44:08 what is reduce operation - transform a collection into a concrete value or object 1:44:51 another reduce operation - collection 1:45:45 a wrong approach to do collect 1:47:00 explanation of the wrong code 1:47:18 shared mutability is devil 1:49:04 use Collectors.collect 1:51:17 Collectors.toMap 1:54:17 groupingBy 1:54:38 example 1:57:40 another example with mapping() method 1:59:37 performance 2:05:40 Q: How much work? 2:09:30 streams are LAZY 2:10:49 intermediate operations are postponed for evaluation 2:13:00 important * 2:15:43 * 2:16:15 2:17:37 demo for performance analysis 2:19:36 lazy evaluations are only performed when the terminal operation is triggered 2:27:08 intermediate operation - Stream.sorted()
finally, someone intelligent and articulate enough with great dynamic working examples explains lambda and double colon. thank you. after much searching its finally clear to me. ☺
Venkat was my professor at UH for my last year in computer science. He is by far the BEST computer sceince professor I have ever had. I learned more from him in one semester than I did from when I started coding in highschool.
I created an IntelliJ plugin which provides similar functionality which outputs the result of a Java main execution as a tooltip. The plugin can be found here: plugins.jetbrains.com/plugin/8543?pr=idea
Like this talk and the way of communicating some of the design philosophies. Not just what can be done.. but also the why and how of it is covered here.
superioriginality = qualities.reduce(blessing, (feature, excellency) -> feature.add(excellency)); Dr. Subramaniam rocks as ever. Thank you for another great session !
One of my new favorite speakers ever. It's all gold, but the motivational parts especially, even tho the technical details are all spot on and valuable. Like 1:02 thru 1:05, not strictly technical, but extremely important in terms of WHY we need to modernize our Java style....
34:49 "And for the first time, in a long time, Java is finally intelligent" that was the moment I lost it. This guy has such a talent of explaining stuff!
I just can't express how glad I am to land here. He has explained java 8 features with so much depth and conviction. Venkat sir just knows the features inside out and he is in love with Java. ❤
Really an awesome talk,the way you explained with real time examples and jokes is really superb. You made Lambda and Stream learning so easier. Pleasure to saw your teaching and Gonna see all your talks in you tube. One of the best java talk ever ! Thank you so much Venkat
Indeed a great talk on lambdas and streams. If you have been coding in java for a year or more , then you could even watch it at 1.75x without losing on any info
Wow! Great explaination of Lambda and Streams. His explaination and examples are so concise and easy to understand that I've ever seen. Very very thanks !!
I just love that editor and how intelligent that thing is! Venkat should do just one nice session on that editor setup. That would help the community so much :)
"When you have 9 million programmers using your language and out of which 1 million programmers know where you live you have to decide things differently." :D
Nice explanation sir... Very informative.. I would say I have never attend any tech show.. Where someone explained like this during my entire career.. Lol now I got it what was missed in my eduction. 😕😕
Hi venkat, I referred so many author's to understand java8 features, but some how I got ur video in the list. I just looked into it, it was just awesome. Thank you for ur efforts
"If a language does not support backward compatibility, it is DOOMED; we also know if a language supports backward compatibility it's also DOOMED!... and so it's a question really choosing which way you like to be DOOMED!" LMAO!
While explaining the time taken by for loop in finding the value of even number greater than 3 and multiplying the same by 2, Venkat explained as if the for loop goes through all the values before giving the result. The explanation of men in black T shirt, white shoes etc., strengthen this impression. As someone, mentioned a break statement at the end of the for loop as soon as the required number is found, then the for loop will stop functioning. No doubt writing a stream function is easier and clearer than writing a for loop. For loop does take more time than the stream, no doubt, but the explanation needs modification.
Very clear and useful informations, very grateful for them. A question though: isn't also type inferrence when you only have to write List cars = new ArrayList() instead of List cars = new ArrayList()? - you are saying that Java 8 has type inference only for lambda expressions...
7:00 lambda
7:26 backward compatibility of Java
8:18
9:34 why Java 8 is backed by single abstract method interfaces (@FunctionalInterface)
9:47 if an interface is single abstract method interface, you can use lambdas instead of anonymous inner classes
11:47 how does it work under the hood
12:49 illusion aobut lambda - syntax sugar, i.e. on the instruciton level, it is the same as anonymous inner class
14:16 what lambda does under the hood
14:47 what would the compiler be doing with lots of lambda (assumption only)
* 18:16 why it is not a good idea for lambdas to create extra classes like anonymous inner classes
19:14 a new feature since Java 7 - instruction - invokedynamic
20:53 in Java 8 struggling with the elimination of anonymous inner classes
21:00 the motivation: use invokedynamic to implement lambda expressions
25:16 example
29:18 internal iterator
39:00 method reference
44:28 avoid the urge of writing a large lambda expression - an anti-pattern
44:54 what are method references
45:41 examples of method references
47:15 static method reference
49:31 parameter as a target map(String::toString)
54:58 2 arguments
* 56:23 the order of the arguments are important
57:38 another example - first parameter is the target, second parameter is the argument
59:33 limitations of method reference
1:08:00 filter
1:19:30 second part
1:29:07 stream is an abstraction
1:29:12 a stream is not a physical object with data
1:29:24 a stream is a bunch of functions you will evaluate eventually. There is no data sitting in a stream
1:29:48 a stream is a non mutating pipeline - stream is not mutating the data in a collection
1:30:31 stream functions
1:33:11 transforming function - Stream.map
1:37:25 Stream.reduce()
1:43:47 InStream/DoubleStream.sum() - also a reduction operation
1:44:08 what is reduce operation - transform a collection into a concrete value or object
1:44:51 another reduce operation - collection
1:45:45 a wrong approach to do collect
1:47:00 explanation of the wrong code
1:47:18 shared mutability is devil
1:49:04 use Collectors.collect
1:51:17 Collectors.toMap
1:54:17 groupingBy
1:54:38 example
1:57:40 another example with mapping() method
1:59:37 performance
2:05:40 Q: How much work?
2:09:30 streams are LAZY
2:10:49 intermediate operations are postponed for evaluation
2:13:00 important
* 2:15:43
* 2:16:15
2:17:37 demo for performance analysis
2:19:36 lazy evaluations are only performed when the terminal operation is triggered
2:27:08 intermediate operation - Stream.sorted()
Awesome toc 👍☺
Very informative and well explained, thank you.
You probably made it for yourself, didn't you ;)
@@infitium7246 yes, i have bad memory, so jot it down make me remember better :)
Hats off!
Venkat is not just really knowledgeable but he knows how tell and express concept in the way even a kid could understand . Thanks .
2w
@@veenasharma2440 from india?
@@udaykiran557 from india?
@@satishsatyan3520 Yes
@@udaykiran557 .
One of the best java talks ever seen.
Very informative.
短短的看到哦的哦地盘耳畔网片 W_PP_W_PE_PE_PE_PD
agree
The best java talk I've ever seen
me too...:)
.
Same here
finally, someone intelligent and articulate enough with great dynamic working examples explains lambda and double colon. thank you. after much searching its finally clear to me. ☺
youtube rocks
The best speaker I've ever heard. I am delighted
What a great speaker.
I have been converted to functional style programming using Lamdas and Streams thanks to Venkat.
Double thumbs up!
1:02:40-1:05 the heart of programming! Great talk!
Best!
Venkat was my professor at UH for my last year in computer science. He is by far the BEST computer sceince professor I have ever had. I learned more from him in one semester than I did from when I started coding in highschool.
I created an IntelliJ plugin which provides similar functionality which outputs the result of a Java main execution as a tooltip. The plugin can be found here: plugins.jetbrains.com/plugin/8543?pr=idea
Love his enthusiasm and his crisp and clear explanation.
This is how you explain advanced stuff in simple way. Tell me why i should bother to use a new feature. Amazing.
This guy speaks very well. Usually indian guys are hard to understand. This guy is awesome!
Like this talk and the way of communicating some of the design philosophies. Not just what can be done.. but also the why and how of it is covered here.
Well he said you came here for Lambda but stayed here for stream but I got addicted to Venkat. Amazing speaker. Thank you.
superioriginality = qualities.reduce(blessing, (feature, excellency) -> feature.add(excellency)); Dr. Subramaniam rocks as ever. Thank you for another great session !
Really amazing. I am a big fan of Venkat. His book "Functional Programming in Java" is also a must read for all Java Developers.
Thanks for comment, I needed some book as a guide.
This is hands down the best Java conference evere made
One of my new favorite speakers ever. It's all gold, but the motivational parts especially, even tho the technical details are all spot on and valuable. Like 1:02 thru 1:05, not strictly technical, but extremely important in terms of WHY we need to modernize our Java style....
he is best at explaining things...became fan of him.
34:49 "And for the first time, in a long time, Java is finally intelligent" that was the moment I lost it. This guy has such a talent of explaining stuff!
This guy is a great speaker! Thanks for the awesome talk.
I just can't express how glad I am to land here. He has explained java 8 features with so much depth and conviction. Venkat sir just knows the features inside out and he is in love with Java. ❤
Just watched 24 mins and gave my like to the video. What a speaker, cheers!!! -)
I'm fortunate to watch this video! Speechless.. Absolutely recommended for people like me who didn't know the potentials of lambdas and streams.
What a great talk, Venkat gave the best explanation about streams I've seen, and I've seen quite a few so far.
Cant believe i just listen through the whole video...
He is brilliant teacher
Really an awesome talk,the way you explained with real time examples and jokes is really superb. You made Lambda and Stream learning so easier. Pleasure to saw your teaching and Gonna see all your talks in you tube. One of the best java talk ever ! Thank you so much Venkat
Buddy, I caught you here. I even like the talk. best ever java talk
One of the best java talks I have ever scene that even a beginner can understand it...
I sincerely wish I could like this video more than once. Simply brilliant
GREAT!!!! so many details! so many examples! awesome! thank you a lot!
Fantastic presentation! What a great speaker! One of the best presentations that I've watched.
I had come to see this video to brush my knowlege. I ended up learning many new things. excellent explaination
Great talk, very informative for those who are starting to work on java 8. Awesome explanation.
Thanks a lot for such a informative talk.. watched entire 2:47 hours
This is one of the best videos that I saw about Streams and Lambdas!!
Indeed a great talk on lambdas and streams. If you have been coding in java for a year or more , then you could even watch it at 1.75x without losing on any info
Wow! Great explaination of Lambda and Streams. His explaination and examples are so concise and easy to understand that I've ever seen. Very very thanks !!
He is amazing!! Best Java talk ever
His pace of explanation is perfectly suitable for me
Venkat is an awesome teacher! Thanks a lot for sharing!
Indians are awesome! thanks, Venkat sir.
Claps for your passion for programming especially for your comments at 1:00
Brilliant. Best value for 2 hours spend watching the video
your one of the best teacher I have seen till now..
I just love that editor and how intelligent that thing is! Venkat should do just one nice session on that editor setup. That would help the community so much :)
Did you find that already?
@@kpvenkatesan Its TextMate
1:06:00 One of the best explainations
Wow, not sure why I didn't use of java 8 functional style until now. Great talk
A rare species : someone who can do tech, can talk and also keep you engaged for a full 3 hours.
Thank you so much, Venkat!!!
Thanks a lot this man is competent,
Small mistake on 1:43:00 the first param of reduce is actually R not T. the same as return type.
As the title says, I addicted to Stream; But I addicted to your lectures more than it. Thanks Venkat, it was really helpful.
Awesome. Excellent presentation. I wish I have seen this earlier. Recommend.
Finest explanation on streams. Thank you very much!
Been 6 years and it's still useful :)
"When you have 9 million programmers using your language and out of which 1 million programmers know where you live you have to decide things differently." :D
HEX D
just came to learn lambda.... never had a blast before learning programming concepts
Really like the part with the performance analysis, most video about FP stop on the declarative part and don't go further.
Thanks Sir, you got my like
Amazing lecture on functional programming. The best I ever heard!
Thank you. It is such informative video and I really love the way you present it.
Nice explanation sir... Very informative.. I would say I have never attend any tech show.. Where someone explained like this during my entire career.. Lol now I got it what was missed in my eduction. 😕😕
Awesome sessions. Java made easy and interesting. Excellent speech.
Hi venkat, I referred so many author's to understand java8 features, but some how I got ur video in the list. I just looked into it, it was just awesome. Thank you for ur efforts
"If a language does not support backward compatibility, it is DOOMED; we also know if a language supports backward compatibility it's also DOOMED!... and so it's a question really choosing which way you like to be DOOMED!"
LMAO!
There's a lot of crap in his talk apart from the actual content, which wastes my time. I am better off reading a book than watching his talk.
Just upgrade and move on.
make your nuts tight!
Venkat is brilliant. Indian minds are like gods.
its about perceiving and realizing. Not blind mugging.
While explaining the time taken by for loop in finding the value of even number greater than 3 and multiplying the same by 2, Venkat explained as if the for loop goes through all the values before giving the result. The explanation of men in black T shirt, white shoes etc., strengthen this impression. As someone, mentioned a break statement at the end of the for loop as soon as the required number is found, then the for loop will stop functioning. No doubt writing a stream function is easier and clearer than writing a for loop. For loop does take more time than the stream, no doubt, but the explanation needs modification.
Great explanation with great examples... Thank u for giving me the imp of lambda & stream.
think new session required to introduce ide 😁, very impressed. thanks a lot
Am binge-watching presentations by Venkat.
Content and the way it is explained is nice. Thank you.
Really finding it very interesting and glued.
He's so awesome, thanks for the talk!
Its really a very good talk!!! The way concepts presented helps understanding it from the core.. Great job sir.
Brilliant analogy !!!, I wish I could give Super Like or more likes to this talk :-)
This man is really good at talking and explaining
Very dynamic person!!
Venkat , you are simply amazing.. Great talk!
"A person who uses all the tools are called consultants" (1:05) - hahaha, you made my day sir!
Really, really, awesome!
Amazing explanation. I ever scene this kind explanation
Wonderful speaker.. amazing analogies
1:15:48 "If you gonna take so long and suck , you would rather suck quickly." Lol 😂.. man that was damn hilarious..
This video is gold.!
Great Job!!!!
What entertaining educational talk, thoroughly enjoyed!
Fantastic explaination..... 5 Starts
The Best java talks i have ever seen...
gc() those unlikers...
And with no shoes ... love u bro !!!
Awesome presentation. Truly gifted at explaining concepts
One of the best java talks!!
Very clear and useful informations, very grateful for them. A question though: isn't also type inferrence when you only have to write List cars = new ArrayList() instead of List cars = new ArrayList()? - you are saying that Java 8 has type inference only for lambda expressions...
Great job Mr. Subramaniam !
Good explanation Hats off
Lovely talks. the best moment is 34:55 LOL . thank you Venkat
GREAT!!! Awesome presentation. Thanks a lot...
This presentation was magnificent !
Best Talk Heard Yet!
You are one of the very best.
Simply awesome!
Great respect to you sir 🙏🏽
Brilliant presentation.