From 4d03843e505abebb204e3f8be136156207d41f64 Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Sat, 8 Aug 2026 15:29:51 +0800
Subject: [PATCH] =?UTF-8?q?s-day07-=20=E8=8E=B7=E5=8F=96Stream=E6=B5=81?=
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---
 .../src/com/inmind/stream07/StreamDemo13.java | 54 +++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 s-day07/src/com/inmind/stream07/StreamDemo13.java

diff --git a/s-day07/src/com/inmind/stream07/StreamDemo13.java b/s-day07/src/com/inmind/stream07/StreamDemo13.java
new file mode 100644
index 0000000..6bc08d4
--- /dev/null
+++ b/s-day07/src/com/inmind/stream07/StreamDemo13.java
@@ -0,0 +1,54 @@
+package com.inmind.stream07;
+
+import java.util.*;
+import java.util.stream.Stream;
+
+/*
+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 StreamDemo13 {
+    public static void main(String[] args) {
+        //单列集合
+        //list集合
+        ArrayList<String> list = new ArrayList<>();
+        list.add("张三1");
+        list.add("张三2");
+        list.add("张三3");
+        Stream<String> stream1 = list.stream();
+        System.out.println(stream1);
+
+        //set集合
+        HashSet<String> sets = new HashSet<>();
+        sets.add("张三1");
+        sets.add("张三2");
+        sets.add("张三3");
+        Stream<String> stream2 = sets.stream();
+        System.out.println(stream2);
+        //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entrySet()
+        HashMap<String, String> map = new HashMap<>();
+        map.put("刘备", "孙尚香");
+        //1.所有的键的集合keySet()
+        Set<String> keys = map.keySet();
+        Stream<String> stream3 = keys.stream();
+        //2.所有的值的集合values()
+        Collection<String> values = map.values();
+        Stream<String> stream4 = values.stream();
+        //3.所有的键值对对象的集合entrySet()
+        Set<Map.Entry<String, String>> entries = map.entrySet();
+        Stream<Map.Entry<String, String>> stream5 = entries.stream();
+
+        //数组获取流
+        String[] arr = {"张三1","张三2","张三3"};
+        Stream<String> stream6 = Stream.of(arr);
+        Stream<Integer> stream7 = Stream.of(1, 2, 3, 4, 5);
+
+    }
+}