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Java 8 Streams: Pare de usar 'for' e simplifique seu código!

List <Integer> lista = Arrays.asList(1, 5, 8, 7, 4, 2, 3, 2, 1, 8, 5, 7, 4); lista.stream() .map(e -> e * 2) // multiplica cada item por 2 .

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