Versuchen Sie es mit der Stream-API in Java

public class Test {
	public static void main(String[] args) {
		List<Integer> sales = new ArrayList<>(Arrays.asList(12, 30, 22, 4, 9));
		for (Integer sale : sales) {
			if (sale % 3 == 0 ) {
				System.out.println(sale);
			}
		}

		sales
		.stream()
		.filter(e -> e % 3 == 0)
		.forEach(System.out::println);

		sales
		.stream()
		.filter(e -> e % 3 == 0)
		.map(e -> "(" + e + ")")
		.forEach(System.out::println);
	}
}

12
30
9
12
30
9
(12)
(30)
(9)

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