From 6d8d7ef388c3d6936f2bdf561b220c356c2e6462 Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Mon, 3 Aug 2026 11:58:20 +0800
Subject: [PATCH] =?UTF-8?q?s-day04-=E5=8D=95=E5=88=97=E5=92=8C=E5=8F=8C?=
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---
 s-day04/src/com/inmind/of04/OfDemo11.java | 25 +++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 s-day04/src/com/inmind/of04/OfDemo11.java

diff --git a/s-day04/src/com/inmind/of04/OfDemo11.java b/s-day04/src/com/inmind/of04/OfDemo11.java
new file mode 100644
index 0000000..81ba46d
--- /dev/null
+++ b/s-day04/src/com/inmind/of04/OfDemo11.java
@@ -0,0 +1,25 @@
+package com.inmind.of04;
+
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+/*
+    在JDK9中对单列和双列集合，定义了一个静态方法of，它能快速创建出简单的集合，保证集合不变的
+
+    使用场景：
+        在业务编写时，可以设计为不能更改的固定值，营业中，打烊中，准备中
+ */
+public class OfDemo11 {
+    public static void main(String[] args) {
+        //List的of方法
+        List<Integer> list = List.of(1, 2, 3, 4, 5);
+        System.out.println(list);
+        //Set的of方法
+        Set<String> sets = Set.of("1", "2", "3", "4", "5");
+        System.out.println(sets);
+        //Map的of方法
+        Map<Integer, String> map = Map.of(1, "张三", 2, "lisi", 3, "wangwu");
+        System.out.println(map);
+    }
+}