Stream

Optional

• When using Streams, the stream might not have a result, e.x it might be empty. Java uses Optional to see if there any result.

Optional<Integer> max = numbers.stream()
				.max(Integer::compareTo);
max.ifPresent(System.out::println);
//if any number is found, it's gonna be printed. If not, Optional returns empty that can be managed with ifPresent.
//we can alse use `orElse()`

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java