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Keep the positive numbers.

Start with four numbers: −3, 0, 2 and 5. Keep each number greater than zero. The result contains 2 and 5, in the same order.

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positive.java

var numbers = java.util.List.of(-3, 0, 2, 5);
var positive = numbers.stream()
    .filter(number -> number > 0)
    .toList();