From a5a65edb808b02709b10f7be23394e4916a93232 Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Sat, 14 Mar 2026 14:47:47 +0800
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---
 .../src/com/inmind/stream03/StreamDemo17.java | 57 +++++++++++++++++++
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 create mode 100644 javaSE-day07/src/com/inmind/stream03/StreamDemo17.java

diff --git a/javaSE-day07/src/com/inmind/stream03/StreamDemo17.java b/javaSE-day07/src/com/inmind/stream03/StreamDemo17.java
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+++ b/javaSE-day07/src/com/inmind/stream03/StreamDemo17.java
@@ -0,0 +1,57 @@
+package com.inmind.stream03;
+
+import java.util.*;
+import java.util.stream.Stream;
+
+/*
+学习内容：获取Stream流的两种方式(重点)
+Stream流的获取方式：
+    1.单列集合Collection的stream方法，得到单列集合的stream流
+    Collection接口
+        default Stream<E> stream() 返回一个序列 Stream与此集合作为其来源。
+    2.Stream接口的of方法，将多个数据组成一个流
+    Stream接口
+        static <T> Stream<T> of(T... values) 返回其元素是指定值的顺序排序流。
+ */
+public class StreamDemo17 {
+    public static void main(String[] args) {
+        //1.单列集合获取流
+        //list集合:ArrayList LinkedList
+        List<String> lists = new ArrayList<>();
+        lists.add("张无忌");
+        lists.add("周芷若");
+        lists.add("赵敏");
+        lists.add("张三丰");
+        Stream<String> stream = lists.stream();//多态
+        System.out.println(stream);
+
+        //set集合:HashSet LinkedHashSet TreeSet
+        Set<String> sets = new HashSet<>();
+        sets.add("张无忌");
+        sets.add("周芷若");
+        sets.add("赵敏");
+        sets.add("张三丰");
+        Stream<String> stream1 = sets.stream();
+        System.out.println(stream1);
+
+        //2.双列集合获取流
+        //Map双列集合没有定义stream方法，只能通过转为单列集合间接获取流
+        //间接获取流：1.所有的键的集合keySet() 2.所有的值的集合values() 3.所有的键值对对象的集合
+        //2.1 所有的键的集合keySet()
+        HashMap<String, String> map = new HashMap<>();
+        map.put("刘备", "孙尚香");
+        map.put("吕布", "貂蝉");
+        Set<String> set = map.keySet();
+        Stream<String> stream2 = set.stream();
+
+        //2.2 所有的值的集合values()
+        Collection<String> values = map.values();
+        Stream<String> stream3 = values.stream();
+        //2.3 所有的键值对对象的集合
+        Set<Map.Entry<String, String>> entries = map.entrySet();
+        Stream<Map.Entry<String, String>> stream4 = entries.stream();
+
+        //3.Stream接口的of方法
+        Stream<Integer> stream5 = Stream.of(1, 2, 3, 4);
+    }
+}