Using Java 8 stream methods to get a max value

Question

I would like to get the max value out of a list using java 8 stream methods.

The structure is the following:

• I read a csv file and store the data of every

Answer 1

Use flatMap:

int maxPrize = arrRound.stream() // Stream
                       .flatMap(r -> r.getHits().stream()) // Stream
                       .mapToInt(Hit::getPrizeAmount) // IntStream
                       .max()
                       .orElse(0);