How to find array triplets with sum of two elements equals other element in the same array using stream

import java.util.Arrays;
import java.util.stream.Collectors;
import java.util.stream.IntStream;

public class SumEqualsMatching {
	public static void main(String[] args) {

		int[] numArr = { 50, 108, 47, 61, 34, 184, 97, 71, 87 };

		int arrLen = numArr.length;
		System.out.println("The given array of numbers are");
		System.out.print("[");
		for (int i = 0; i < arrLen; i++)
			System.out.print(numArr[i] + " ");
		System.out.println("]");
		System.out.println("Triplets -> Sum of any two numbers must be available in the array itself");
		System.out.println("[FirstNum  SecondNum   SumNum]");

		/*
		 * Use flatMap, filter and anyMatch to find whether the sum of two numbers is
		 * available in the given array itself
		 */
		System.out.println(IntStream.range(0, numArr.length).boxed()
				.flatMap(i -> IntStream.range(i + 1, numArr.length)
						.filter(j -> Arrays.stream(numArr).anyMatch(x -> x == numArr[i] + numArr[j]))
						.mapToObj(j -> Arrays.asList(numArr[i], numArr[j], numArr[i] + numArr[j])))
				.collect(Collectors.toList()));
	}
}