Java Streams Part 3 - Map Method | Mapping Collection by using Stream | Hands-On

Topics :
---------
1) Map Method
2) Mapping Collection by using Stream
3) Hands-On

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[ibrahimhamid]

Honestly, I have never commented on a video before on youtube but for this I cannot hold my peace than to Thank you for this wonderful videos. You have my 5 stars already. I really really love this

[sudarshanar]

11.24 - it seems, map will take Function as parameter, not Consumer

[Hari_Goud]

map(Function<? super T, ? extends R> mapper)
Returns a stream consisting of the results of applying the given function to the elements of this stream...
Sir u said that map acts like a <consumer> but it acts like a Function right

[bnagarajan]

Fantastic Explanation in Java 8 i saw all udemy and youtubue channel this is one fantastic explanation and eazily understand once study.

[funvideos]

You are Teaching for each and every topic...Thank you so much

[Hari_Goud]

forEach(Consumer<? super T> action)
Performs an action for each element of this stream.
forEach acts like a consumer

[TheMorningLotus]

Great video. Thanks for uploading it. ❤

[sumitgoyal]

Last few minutes of video, I think that you should have performed some operation inside map but you simple printed it, but thank you

[jajatisahoo]

Thanks for this video. It's helpful.

[karuppaiyansubashchandrabo]

The video explains the concept in more understandable form than any other articles in recent past. Yet I would like to know how Streams and the methods are internally working. Is Java really implementing some optimized logic better regular coding or compiler writing regular code internally on behalf us, just for reducing the redundant code?. IS Stream really faster than regular approach?

[poojasharma-ccur]

Question were very very basic pls try to add a bit complex Qs after 1, 2 regular Qs. Because in interviews we were not asked this much basic QS

[tabishrizwan]

Hi Sir,
I want to correct two things. your way of teaching is nice.
1. map-> It takes function as argument Returns a stream consisting of the results of applying the given function to the elements of this stream.
2. In this program there is no need of map(). we can do directly using filter only.

Output-
30000
40000
50000
Kindly look into it.

[ananthshenoy]

Thanks for this video. It's helpful. Is Map and Foreach methods are same?. Because I see both of them can be used to print the list objects

[sanathrayala]

Everything is good sir
Bt one doubt
What if I want to save the modified employee list instead of list<integer>

[Hari_Goud]

Is there video on Optional class java 8 feature ?

[rameshdharnasi]

Send keys functionality not working in my appium program.how to send the data into text field

[ramupanjala]

Hi Sir can ou help me out in this logic?
Create Person class that contains first name, last name, and ID.
- Create a getCommonLastNames() method with that takes List<> as a parameter.
- The method should return a Map<String, List<String>>
whereby the key is the common last name and the value is the list of firstnames of people that share the same last name.

i can do this...
Map<String, String > Map8 = Person1.stream().collect(Collectors.toMap(Person::getFirstName, Person::getLastName));
Map<String, String > Map8 = Person1.stream().filter(f->f.FirstName==f.LastName).collect(Collectors.toMap(Person::getFirstName, Person::getLastName));

[sureshgarine]

Hi sir, after filtering based on Salary, i want to update the salary by increasing 10 percent and return complete employe objects, how can i achieve this

[alpeshmarchande]

Thanks Sir... Please make videos on dot net.