Java 8 - Streams with FlatMap

In this video, I have explained what is flatMap() and what's the use of this on Stream objects.

In Java 8, Stream can hold different data types, for examples:
Stream of String[]
Stream of Set of String
Stream of List of String
Stream of List of Object

But, the Stream operations (filter, sum, distinct…) and collectors do not support it, so, we need flatMap() to do the Stream conversion.

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[parthapramanik]

Watched it the second time. And, it's become super clear to me. Great job Naveen.

[SarangHoley]

Its really awesome to learn form you always 👍😊

[raghugunda]

Thanks for the explanation in minimalistic Great Work!!

[manaliangel]

Hi..i didnt understanding only this chapter..But before 5 chapters i understand easily. Any link where i can study same

[Tvs]

Thanks for the awesome video Naveen . It helped me a lot but only one question if we want to see how many duplicate names are there and what are there how can we findout can u plz let me know . Thanks in advance

[jatinsharma]

I didn't understand Arrays.stream() Ye to sir k upper s gya Sir ji ! What is intermediate operation. These operations are always lazy. ???? What Lazy??

[mounikareddappa]

Let's say I have an list of of objects and each object has name and list of IDs. I want to group each object based on the ID. How to use flatmap for this

Input: Object {"xyz", [1, 2]}
Output: Object{"xyz", 1},
Object{"xyz", 2}