package Codes;

import java.util.Arrays;

import java.util.List;

import java.util.Optional;

public class Stream01 {

public static void main(String[] args) {

// WAP to Count those Numbers whose Greater than 10

// Old Approach

long counter = 0;

List<Integer> list = Arrays.asList(10, 90, 78, 34, 1, 8, 3, 5, 55);

for (int i : list) {

if (i > 10) {

counter++;

}

}

System.out.println("Counter is " + counter);

// Java 8 Style

list.stream().forEach((x) -> System.out.println(x));

counter = list.stream().filter((x) -> x > 10).count();

System.out.println("Counter is " + counter);

// Sum of Array Elements

list = Arrays.asList(1, 2, 3, 4, 1);

System.out.println("Sum of ArrayElements " + list.stream().mapToInt(i -> i).sum());

System.out.println("Average " + list.stream().mapToInt(i -> i).average());

/*

* A stream does not store its elements. They may be stored in an

* underlying collection or generated on demand.

*/

// Optional<Integer> optional =

// list.stream().filter((x)->x>10).findAny();

Optional<Integer> optional = list.stream().filter((x) -> x > 10).findFirst();

if (optional.isPresent()) {

System.out.println(optional.get());

} else {

System.out.println("Not Present");

}

}

}