From e31a7271ff1d9ec4655c69ac0585a608ec04d086 Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Sat, 14 Mar 2026 14:25:07 +0800
Subject: [PATCH] =?UTF-8?q?=E8=BF=9B=E9=98=B6day07-Stream=E6=B5=81?=
 =?UTF-8?q?=E7=9A=84=E6=A6=82=E8=BF=B0?=
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---
 .../src/com/inmind/stream03/StreamDemo16.java | 48 +++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 javaSE-day07/src/com/inmind/stream03/StreamDemo16.java

diff --git a/javaSE-day07/src/com/inmind/stream03/StreamDemo16.java b/javaSE-day07/src/com/inmind/stream03/StreamDemo16.java
new file mode 100644
index 0000000..67bb814
--- /dev/null
+++ b/javaSE-day07/src/com/inmind/stream03/StreamDemo16.java
@@ -0,0 +1,48 @@
+package com.inmind.stream03;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.stream.Collectors;
+
+/*
+学习内容：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 StreamDemo16 {
+    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> list1 = new ArrayList<>();
+        for (String s : list) {
+            if (s.startsWith("张")) {
+                list1.add(s);
+            }
+        }
+        //2. 然后筛选名字有三个字的人；
+        ArrayList<String> list2 = new ArrayList<>();
+        for (String s : list1) {
+            if (s.length() == 3) {
+                list2.add(s);
+            }
+        }
+        System.out.println(list2);
+        //-----------------------------------以下使用Stream流优化以上的代码 -----------------------------
+        List<String> list3 = list.stream()
+                .filter(s -> s.startsWith("张"))
+                .filter(s -> s.length() == 3)
+                .collect(Collectors.toList());
+        System.out.println(list3);
+
+
+    }
+}