Computer scienceProgramming languagesJavaWorking with dataCollectionsCollections framework

The Collections framework overview

Theory

Squaring numbers

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Implement a method called pow2 that takes a collection of numbers and returns a collection of squares of these numbers.

Do not modify elements of the given collection, create a new one and return it as the result instead.

Sample Input 1: 

10 20 -5

Sample Output 1: 

100 400 25
Write a program in Java 17
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Scanner;
import java.util.stream.Collectors;

class CollectionUtils {

public static Collection<Integer> pow2(Collection<Integer> numbers) {
// write your code here
return numbers;
}
}

/* Please, do not modify this I/O code */
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);

Collection<Integer> numbers = Arrays
.stream(scanner.nextLine().split("\\s+"))
.map(Integer::parseInt).collect(Collectors.toList());

Collection<Integer> result = CollectionUtils.pow2(numbers);

System.out.println(result.stream()
.map(Object::toString)
.collect(Collectors.joining(" ")));
}
}
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