From d2eda4d4be91754ac22299a9ca31ac177e045029 Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Wed, 14 Oct 2026 11:47:58 +0800
Subject: [PATCH] =?UTF-8?q?s-day03--Set=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/set02/SetDemo05.java | 26 +++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 s-day03/src/com/inmind/set02/SetDemo05.java

diff --git a/s-day03/src/com/inmind/set02/SetDemo05.java b/s-day03/src/com/inmind/set02/SetDemo05.java
new file mode 100644
index 0000000..c7cbef4
--- /dev/null
+++ b/s-day03/src/com/inmind/set02/SetDemo05.java
@@ -0,0 +1,26 @@
+package com.inmind.set02;
+
+import java.util.HashSet;
+import java.util.Set;
+
+/*
+    Set接口是Collection接口的子接口，它拥有Collection的所有功能
+    Set接口的特点：
+    1.存取无序（怎么存不一定怎么取）
+    2.没有索引
+    3.不能重复
+
+    Set接口的常用实现类：
+        HashSet     LinkedHashSet
+ */
+public class SetDemo05 {
+    public static void main(String[] args) {
+        //接口的多态
+        Set<String> sets = new HashSet<>();
+        sets.add("张飞");
+        sets.add("关羽");
+        sets.add("刘备");
+        sets.add("张飞");
+        System.out.println(sets);
+    }
+}