diff --git a/day11/src/com/inmind/limit02/Class1.java b/day11/src/com/inmind/limit02/Class1.java
new file mode 100644
index 0000000..100a475
--- /dev/null
+++ b/day11/src/com/inmind/limit02/Class1.java
@@ -0,0 +1,11 @@
+package com.inmind.limit02;
+
+public class Class1 {
+    public static void main(String[] args) {
+        //在同一个包中只有私有的内容，不能被访问
+        //System.out.println(LimitDemo05.num1);
+        System.out.println(LimitDemo05.num2);
+        System.out.println(LimitDemo05.num3);
+        System.out.println(LimitDemo05.num4);
+    }
+}
diff --git a/day11/src/com/inmind/limit02/LimitDemo05.java b/day11/src/com/inmind/limit02/LimitDemo05.java
new file mode 100644
index 0000000..d13a30c
--- /dev/null
+++ b/day11/src/com/inmind/limit02/LimitDemo05.java
@@ -0,0 +1,24 @@
+package com.inmind.limit02;
+/*
+6.四种权限修饰符:可以用来修饰类，方法，成员变量
+                        public       >        protected        >           (default)         >          private
+同一个类中                  YES                  YES                             YES                         YES
+同一个包                    YES                 YES                             YES                         NO
+在不同包（父子关系）          YES                 YES                             NO                          NO
+在不同包（非父子关系）         YES                 NO                              NO                          NO
+
+ */
+public class LimitDemo05 {
+    //定义4种权限的静态变量
+    private static  int num1 = 10;
+    static  int num2 = 20;
+    protected static  int num3 = 30;
+    public static  int num4 = 40;
+
+    public static void main(String[] args) {
+        System.out.println(num1);
+        System.out.println(num2);
+        System.out.println(num3);
+        System.out.println(num4);
+    }
+}
diff --git a/day11/src/com/inmind/limit02/sub/Class2.java b/day11/src/com/inmind/limit02/sub/Class2.java
new file mode 100644
index 0000000..d39440c
--- /dev/null
+++ b/day11/src/com/inmind/limit02/sub/Class2.java
@@ -0,0 +1,14 @@
+package com.inmind.limit02.sub;
+
+import com.inmind.limit02.LimitDemo05;
+
+//在不同包（父子关系）
+public class Class2 extends LimitDemo05 {
+    public static void main(String[] args) {
+        //在不同包（父子关系）,大于等于protected才可以被访问
+        //System.out.println(LimitDemo05.num1);
+        //System.out.println(LimitDemo05.num2);
+        System.out.println(LimitDemo05.num3);
+        System.out.println(LimitDemo05.num4);
+    }
+}
diff --git a/day11/src/com/inmind/limit02/sub/Class3.java b/day11/src/com/inmind/limit02/sub/Class3.java
new file mode 100644
index 0000000..b0329fe
--- /dev/null
+++ b/day11/src/com/inmind/limit02/sub/Class3.java
@@ -0,0 +1,13 @@
+package com.inmind.limit02.sub;
+
+import com.inmind.limit02.LimitDemo05;
+
+public class Class3 {
+    public static void main(String[] args) {
+        //在不同包（父子关系）,大于等于protected才可以被访问
+        //System.out.println(LimitDemo05.num1);
+        //System.out.println(LimitDemo05.num2);
+        //System.out.println(LimitDemo05.num3);
+        System.out.println(LimitDemo05.num4);
+    }
+}