From 36158e5e386a8205fe0b2f37e2d21f6c9f2b2d11 Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Thu, 30 Jul 2026 16:57:35 +0800
Subject: [PATCH] =?UTF-8?q?s-day02-=E5=A2=9E=E5=BC=BAfor=E5=BE=AA=E7=8E=AF?=
 =?UTF-8?q?=E9=81=8D=E5=8E=86=E9=9B=86=E5=90=88?=
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---
 s-day02/src/com/inmind/foreach03/Demo05.java | 27 ++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 s-day02/src/com/inmind/foreach03/Demo05.java

diff --git a/s-day02/src/com/inmind/foreach03/Demo05.java b/s-day02/src/com/inmind/foreach03/Demo05.java
new file mode 100644
index 0000000..aae50ff
--- /dev/null
+++ b/s-day02/src/com/inmind/foreach03/Demo05.java
@@ -0,0 +1,27 @@
+package com.inmind.foreach03;
+
+import java.util.ArrayList;
+import java.util.Collection;
+
+/*
+增强for循环遍历集合
+注意：集合的foreach循环本质是迭代器，那么所有的单列集合都可以用foreach遍历
+ */
+public class Demo05 {
+    public static void main(String[] args) {
+        //单列集合的多态写法
+        Collection<Integer> cols = new ArrayList<>();
+        cols.add(1);
+        cols.add(2);
+        cols.add(3);
+        cols.add(4);
+        //遍历集合,无法使用普通for循环遍历
+        for (Integer i : cols) {
+            System.out.println(i);
+        }
+
+        for (Integer element : cols) {
+            System.out.println( element);
+        }
+    }
+}