how to find maximum value from a Integer using stream in java 8?

Question

I have a list of Integer list and from the list.stream() I want the maximum value. What is the simplest way? Do I need comparator?

Answer 1

You can also use below code snipped:

int max = list.stream().max(Comparator.comparing(Integer::valueOf)).get();

Another alternative:

list.sort(Comparator.reverseOrder()); // max value will come first
int max = list.get(0);  

Answer 2

Correct code:

int max = list.stream().reduce(Integer.MIN_VALUE, (a, b) -> Integer.max(a, b));

or

int max = list.stream().reduce(Integer.MIN_VALUE, Integer::max);