java8-tutorial/src/com/winterbe/java8/Streams8.java at master · tspannatpivotal/java8-tutorial · GitHub

39 lines (31 loc) · 960 Bytes

package com.winterbe.java8;

import java.util.Arrays;

import java.util.stream.IntStream;

import java.util.stream.Stream;

/**

* @author Benjamin Winterberg

public class Streams8 {

public static void main(String[] args) {

Arrays.asList("a1", "a2", "a3")

.stream()

.findFirst()

.ifPresent(System.out::println);

Stream.of("a1", "a2", "a3")

.map(s -> s.substring(1))

.mapToInt(Integer::parseInt)

.max()

.ifPresent(System.out::println);

IntStream.range(1, 4)

.mapToObj(i -> "a" + i)

.forEach(System.out::println);

Arrays.stream(new int[] {1, 2, 3})

.map(n -> 2 * n + 1)

.average()

.ifPresent(System.out::println);

Stream.of(1.0, 2.0, 3.0)

.mapToInt(Double::intValue)

.mapToObj(i -> "a" + i)

.forEach(System.out::println);

}

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