From 768fa7f74e1a181a022ea56aaa0f4374a32e80f0 Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Sun, 2 Aug 2026 10:04:03 +0800
Subject: [PATCH] =?UTF-8?q?s-day02-Set=E6=8E=A5=E5=8F=A3=E7=9A=84=E7=89=B9?=
 =?UTF-8?q?=E7=82=B9?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 s-day03/src/com/inmind/set02/SetDemo06.java | 26 +++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 s-day03/src/com/inmind/set02/SetDemo06.java

diff --git a/s-day03/src/com/inmind/set02/SetDemo06.java b/s-day03/src/com/inmind/set02/SetDemo06.java
new file mode 100644
index 0000000..3f58ece
--- /dev/null
+++ b/s-day03/src/com/inmind/set02/SetDemo06.java
@@ -0,0 +1,26 @@
+package com.inmind.set02;
+
+import java.util.HashSet;
+import java.util.Set;
+
+/*
+    Set集合是Collection集合的子接口,所以它拥有Collection接口的所有功能.
+    Set接口的特点:
+        1.存取无序(怎么存的不一定怎么取)
+        2.没有索引
+        3.不能重复
+
+     Set接口的实现类:
+        HashSet   LinkedHashSet
+ */
+public class SetDemo06 {
+    public static void main(String[] args) {
+        //Set集合的三个特点（Set接口多态写法）
+        //父接口引用指向实现类对象
+        Set<String> sets = new HashSet();
+        sets.add("刘备");
+        sets.add("关羽");
+        sets.add("张飞");
+        System.out.println(sets);
+    }
+}