From b9eae623ae4077f236fa5449d8461348f467a8e7 Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Fri, 31 Jul 2026 13:46:57 +0800
Subject: [PATCH] =?UTF-8?q?s-day02-List=E6=8E=A5=E5=8F=A3=E7=9A=84?=
 =?UTF-8?q?=E7=89=B9=E7=82=B9?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 s-day03/src/com/inmind/list01/Demo01.java | 28 +++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 s-day03/src/com/inmind/list01/Demo01.java

diff --git a/s-day03/src/com/inmind/list01/Demo01.java b/s-day03/src/com/inmind/list01/Demo01.java
new file mode 100644
index 0000000..d499abc
--- /dev/null
+++ b/s-day03/src/com/inmind/list01/Demo01.java
@@ -0,0 +1,28 @@
+package com.inmind.list01;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/*
+    List接口的特点：
+    1.存取有序
+    2.有索引
+    3.可以重复
+    List接口的常用实现类
+    ArrayList   LinkedList
+
+    List接口是Collection的子接口，前天学习的单列集合API是都能使用
+
+ */
+public class Demo01 {
+    public static void main(String[] args) {
+        //List接口的多态
+        List<String> list = new ArrayList<>();
+        list.add("刘备");
+        list.add("关羽");
+        list.add("张飞");
+        list.add("关羽");
+        System.out.println(list);//存取有序（怎么存就怎么取）
+        System.out.println(list.get(3));//有索引，可以重复
+    }
+}