CODEWITHSUNDEEP
javalambdajava-8java-stream
user8838577
user8838577

Reputation:

Is it possible to add add elements to an array using IntStream?

I was using this macro in cpp

forn(i,3) cin>>arr[n]; //assume arr initialised earlier

So I was tried to achieve this in Java using lambda and IntStream

  Scanner sc = new Scanner(System.in);
  IntStream.range(0, 5).map(i->arr[i]).forEach(e->e=sc.nextInt());

But I know that stream doesn't manipulate the underlying data structure. so Can I achieve this using streams or I've to create my own functional interface to do so? thank you

Upvotes: 2

Views: 1046

Answers (2)

Naman
Naman

Reputation: 31968

You seem to be looking for the use of toArray with IntStream while you map the integer provided as an input:

int arr[] = IntStream.range(0, 5).map(i -> sc.nextInt()).toArray()

Upvotes: 3

Nazaret K.
Nazaret K.

Reputation: 3559

Just change your code to

Scanner sc = new Scanner(System.in);
IntStream.range(0, 5).forEach(i -> arr[i] = sc.nextInt());

But also note that this is not a great use case for Streams. A simple loop would probably be more appropriate.

Upvotes: 3

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