How to find the average value of the stream using the "reduce" function in Java Stream API?

Question

I have :

Stream.of(120, 410, 85, 32, 314, 12)

I tried, but seems it not right:

Stream.of(120, 410, 85, 32, 314, 12).reduce((a, b) -> b * b / a);

Answer 1

This is an easier way to solve it:

double average = IntStream.of(120, 410, 85, 32, 314, 12)
    .average()
    .getAsDouble();

System.out.println(average);

Output:

162.16666666666666