Demo02GetStream.java

package Demo02StreamAndMethodReference;

import java.util.*;
import java.util.stream.Stream;

public class Demo02GetStream {
    public static void main(String[] args) {
        List<String> list = new ArrayList<>();
        Stream<String> stream1 = list.stream();

        Set<String> set = new HashSet<>();
        Stream<String> stream2 = set.stream();

        Map<String,String> map = new HashMap<>();
        Set<String> keySet = map.keySet();
        Stream<String> stream3 = keySet.stream();

        Collection<String> values = map.values();
        Stream<String> stream4 = values.stream();

        Set<Map.Entry<String,String>> entries = map.entrySet();
        Stream<Map.Entry<String, String>> stream5 = entries.stream();

        Stream<Integer> stream6 = Stream.of(1, 2, 3, 4, 5);
        Integer[] arr = {1,2,3,4,5};
        Stream<Integer> stream7 = Stream.of(arr);
        String[] arr1 = {"aaa", "ff", "ccc"};
        Stream<String> stream8 = Stream.of(arr1);
    }
}