Mapping Operations in Stream
Explore how to transform elements in Java streams using map and flatMap methods. Understand when to use mapToInt and other primitive variants to handle primitive data. This lesson helps you apply these operations for effective data processing with the Stream API.
We'll cover the following...
Mapping operations are those operations that transform the elements of a stream and return a new stream with transformed elements.
We can use a variety of methods to transform a stream into another stream object. The two most common methods used are map() and flatMap().
Understanding map()
The map() method takes a lambda expression as its only argument and uses it to change every individual element in the stream.
Its return value is a new stream object containing the changed elements.
Below is the method definition:
<R> Stream<R> map(Function<? super T, ? extends R> mapper)
Input Parameter -> A function ...