From b7955a05e04283872bfab0de599ee4d6e4bfb28c Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Sat, 8 Aug 2026 15:06:32 +0800
Subject: [PATCH] =?UTF-8?q?s-day07-=20=E4=BC=A0=E7=BB=9F=E6=93=8D=E4=BD=9C?=
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---
 s-day07/src/com/inmind/stream07/Demo12.java | 48 +++++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 s-day07/src/com/inmind/stream07/Demo12.java

diff --git a/s-day07/src/com/inmind/stream07/Demo12.java b/s-day07/src/com/inmind/stream07/Demo12.java
new file mode 100644
index 0000000..ff0f80e
--- /dev/null
+++ b/s-day07/src/com/inmind/stream07/Demo12.java
@@ -0,0 +1,48 @@
+package com.inmind.stream07;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/*
+传统操作集合和Stream流操作集合的对比
+
+需求:
+1. 首先筛选所有姓张的人；
+2. 然后筛选名字有三个字的人；
+3. 最后进行对结果进行打印输出。
+
+
+ */
+public class Demo12 {
+    public static void main(String[] args) {
+        List<String> list = new ArrayList<>();
+        list.add("张无忌");
+        list.add("周芷若");
+        list.add("赵敏");
+        list.add("张强");
+        list.add("张三丰");
+        //1. 首先筛选所有姓张的人；
+        ArrayList<String> zList = new ArrayList<>();
+        for (String s : list) {
+            if (s.startsWith("张")) {
+                zList.add(s);
+            }
+        }
+        System.out.println(zList);
+
+        //2. 然后筛选名字有三个字的人；
+        ArrayList<String> newList = new ArrayList<>();
+        for (String s : zList) {
+            if (s.length() == 3) {
+                newList.add(s);
+            }
+        }
+        System.out.println(newList);
+        //3. 最后进行对结果进行打印输出。
+        for (String s : newList) {
+            System.out.println(s);
+        }
+        System.out.println("------------------以下代码为Stream流写法--------------------");
+        list.stream().filter(s->s.startsWith("张")).filter(s->s.length() == 3).forEach(s-> System.out.println(s));
+    }
+}