filter

With a stream of elements you can also drop the elements of the stream as they flow by¹ with .filter.

.filter will test each element with a predicate. If the predicate returns true the element will be retained. If it returns false the element will be dropped.

var numbers = List.of("1", "2", "3");

Stream<Integer> numberStream = numbers.stream()
    .map(Integer::parseInt) // 1, 2, 3
    .filter(x -> x % 2 == 1); // 1, 3