Stream流创建

package unit6;

import java.util.Arrays;

import java.util.HashMap;

import java.util.Map;

import java.util.stream.Stream;

public class Stream01 {

public static void main(String[] args) {

// 原理理解

// 创建-加工-获取

// (1)stream流创建

// Collection流

Stream<String> s1 = Arrays.asList("11", "22", "33").stream();

Stream<String> s2 = Arrays.asList("11", "22", "33").parallelStream();

// Map不可以创建流、但是Map中的Entry、key、value可以创建Stream流

Map<Integer, String> map = new HashMap();

Stream<Map.Entry<Integer, String>> s3 = map.entrySet().stream();

Stream<Integer> s4 = map.keySet().stream();

Stream<String> s5 = map.values().stream();

}

}