Java 8 features - class 24- Stream APIs Introduction- Collections Vs Streams in detail
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Streams in Java 8:-
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Collections vs Streams
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1. Collections are mainly used to store and group the data
Streams are mainly used to perform the operations on the already stored data.
2. Collections have to be iterated externally
Streams are internally iterated.
3. You can add and remove elements from the Collections
You can't add and remove elements from the Streams
4. Collections can be traversed multiple times
Streams are traversable only once
5. Collections are eagerly constructed
Streams are Lazily constructed
stream() method:-
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The stream() method is provided in the Collection interface in java 1.8 version.
It is used to create a sequential Stream from the collection object
Its return type is Stream E stream();