diff --git a/javaSE-day01/src/com/inmind/system05/Demo23.java b/javaSE-day01/src/com/inmind/system05/Demo23.java
new file mode 100644
index 0000000..683e4f4
--- /dev/null
+++ b/javaSE-day01/src/com/inmind/system05/Demo23.java
@@ -0,0 +1,21 @@
+package com.inmind.system05;
+/*
+System中读取属性和环境变量的方法
+ */
+public class Demo23 {
+    public static void main(String[] args) {
+        //获取java版本
+        String javaVersion = System.getProperty("java.version");
+        System.out.println(javaVersion);
+
+        //获取操作系统名称
+        String osName = System.getProperty("os.name");
+        System.out.println(osName);
+
+        //获取环境变量 Path  JAVA_HOME ,常用于三方框架引入，读取电脑中环境配置，动态生成，执行代码
+        String javaHome = System.getenv("JAVA_HOME");
+        System.out.println(javaHome);
+        String path = System.getenv("Path");
+        System.out.println(path);
+    }
+}