From 70a8eda130e0c83fea11154b169865c1c20b35dd Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Sun, 2 Aug 2026 10:11:40 +0800
Subject: [PATCH] =?UTF-8?q?s-day02-HashSet=E7=89=B9=E7=82=B9=E4=BB=A5?=
 =?UTF-8?q?=E5=8F=8A=E9=81=8D=E5=8E=86?=
MIME-Version: 1.0
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---
 .../src/com/inmind/set02/HashSetDemo07.java   | 37 +++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 s-day03/src/com/inmind/set02/HashSetDemo07.java

diff --git a/s-day03/src/com/inmind/set02/HashSetDemo07.java b/s-day03/src/com/inmind/set02/HashSetDemo07.java
new file mode 100644
index 0000000..24a2a46
--- /dev/null
+++ b/s-day03/src/com/inmind/set02/HashSetDemo07.java
@@ -0,0 +1,37 @@
+package com.inmind.set02;
+
+import java.util.HashSet;
+import java.util.Iterator;
+
+/*
+    HashSet特点以及遍历
+    HashSet就是Set集合的实现类,它的特点也是
+        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
+    HashSet的底层实现是哈希表，就是一个HashMap(双列集合)
+ */
+public class HashSetDemo07 {
+    public static void main(String[] args) {
+        HashSet<String> sets = new HashSet<>();
+        sets.add("刘备");
+        sets.add("关羽");
+        sets.add("张飞");
+        System.out.println(sets);
+        //获取set集合中的元素
+        //Set集合没有get方法，数据如何获取？？只能通过迭代器，转数组，之后的stream流操作
+        //获取迭代器
+        Iterator<String> iterator = sets.iterator();
+        //while循环获取元素
+        while (iterator.hasNext()) {
+            String elment = iterator.next();
+            System.out.println(elment);
+        }
+        //---------------------
+        //增强for循环，foreach循环
+        for (String e : sets) {
+            System.out.println(e);
+        }
+
+    }
+}