From f64832ef3305b2b4d5e9d12ee112f934c50a4924 Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Sat, 21 Mar 2026 15:50:52 +0800
Subject: [PATCH] =?UTF-8?q?=E8=BF=9B=E9=98=B6day09-Properties=20=E7=9A=84?=
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---
 .../inmind/properties06/PropertiesDemo18.java | 38 +++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 javaSE-day09/src/com/inmind/properties06/PropertiesDemo18.java

diff --git a/javaSE-day09/src/com/inmind/properties06/PropertiesDemo18.java b/javaSE-day09/src/com/inmind/properties06/PropertiesDemo18.java
new file mode 100644
index 0000000..4ac11c3
--- /dev/null
+++ b/javaSE-day09/src/com/inmind/properties06/PropertiesDemo18.java
@@ -0,0 +1,38 @@
+package com.inmind.properties06;
+
+import java.util.Properties;
+import java.util.Set;
+
+/*
+    Properties 的特点与基本使用(重点)
+
+    构造方法
+    public Properties() :创建一个空的属性列表。
+
+    常用的存储方法
+    public Object setProperty(String key, String value) ： 保存一对属性。
+    public String getProperty(String key) ：使用此属性列表中指定的键搜索属性值。
+    public Set<String> stringPropertyNames() ：所有键的名称的集合。
+
+    注意:
+        1.Properties类似一个HashMap
+        2.它的真正作用是,能够将指定的配置文件的信息读取到properties对象中
+ */
+public class PropertiesDemo18 {
+    public static void main(String[] args) {
+        //创建属性集对象
+        Properties properties = new Properties();
+        //保存属性键值对
+        /*properties.put("username", "admin");
+        properties.put("password", "123");*/
+        properties.setProperty("username", "admin");
+        properties.setProperty("password", "123");
+
+        Set<String> keys = properties.stringPropertyNames();
+        System.out.println(keys);
+
+        System.out.println(properties);
+
+
+    }
+}