Java8InAction/src/main/java/lambdasinaction/chap8/Peek.java at master · java8/Java8InAction · GitHub

19 lines (13 loc) · 615 Bytes

package lambdasinaction.chap8;

import java.util.List;

import java.util.stream.Stream;

import static java.util.stream.Collectors.toList;

public class Peek {

public static void main(String[] args) {

List<Integer> result = Stream.of(2, 3, 4, 5)

.peek(x -> System.out.println("taking from stream: " + x)).map(x -> x + 17)

.peek(x -> System.out.println("after map: " + x)).filter(x -> x % 2 == 0)

.peek(x -> System.out.println("after filter: " + x)).limit(3)

.peek(x -> System.out.println("after limit: " + x)).collect(toList());

}

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