diff --git a/src/class37/InnerClassDemo1.java b/src/class37/InnerClassDemo1.java
new file mode 100644
index 0000000..ba39c19
--- /dev/null
+++ b/src/class37/InnerClassDemo1.java
@@ -0,0 +1,9 @@
+package class37;
+
+public class InnerClassDemo1 {
+    public static void main(String[] args) {
+        Outer.Inner oi = new Outer().new Inner();
+        //内部类寄生于外部类对象，可以访问其对象，变量，方法
+        oi.show();
+    }
+}
diff --git a/src/class37/InnerClassDemo2.java b/src/class37/InnerClassDemo2.java
new file mode 100644
index 0000000..8ac4df9
--- /dev/null
+++ b/src/class37/InnerClassDemo2.java
@@ -0,0 +1,10 @@
+package class37;
+
+public class InnerClassDemo2 {
+    public static void main(String[] args) {
+        Outer2.Inner inner = new Outer2.Inner();
+        inner.show();
+
+
+    }
+}
diff --git a/src/class37/Outer.java b/src/class37/Outer.java
new file mode 100644
index 0000000..4881364
--- /dev/null
+++ b/src/class37/Outer.java
@@ -0,0 +1,19 @@
+package class37;
+
+public class Outer {
+    private int a = 10 ;
+    public class Inner{
+        private String name;
+
+        public Inner() {
+        }
+
+        public Inner(String name) {
+            this.name = name;
+        }
+
+        public void show(){
+            System.out.println("show");
+        }
+    }
+}
diff --git a/src/class37/Outer2.java b/src/class37/Outer2.java
new file mode 100644
index 0000000..b5fecf4
--- /dev/null
+++ b/src/class37/Outer2.java
@@ -0,0 +1,23 @@
+package class37;
+
+public class Outer2 {
+    public static String schoolName="itheima";
+    // 静态内部类 属于外部类本身持有
+    public static class test{
+        public String name;
+    }
+    public static class Inner{
+        private String name;
+        public void show(){
+            System.out.println(schoolName);
+//            System.out.println(Outer2.test.name);// 静态内部类可以访问外部类的静态成员变量,不可访问非静态成员变量
+        }
+        public void setName(String name){
+            this.name = name;
+        }
+        public String getName(){
+            return name;
+        }
+
+    }
+}
diff --git a/src/class38/Animal.java b/src/class38/Animal.java
new file mode 100644
index 0000000..b069145
--- /dev/null
+++ b/src/class38/Animal.java
@@ -0,0 +1,6 @@
+package class38;
+
+public abstract class Animal {
+    public abstract void cry();
+
+}
diff --git a/src/class38/Test.java b/src/class38/Test.java
new file mode 100644
index 0000000..2638c6f
--- /dev/null
+++ b/src/class38/Test.java
@@ -0,0 +1,14 @@
+package class38;
+
+public class Test {
+    public static void main(String[] args) {
+        Animal Cat = new Animal() {
+            @Override
+            public void cry() {
+                System.out.println("猫是meow meow地叫~~");
+            }// 匿名内部类，本质上是一个类，继承了Animal类，重写了cry方法
+        };
+        Cat.cry();
+    }
+}
+
diff --git a/src/class38/Test2.java b/src/class38/Test2.java
new file mode 100644
index 0000000..858161c
--- /dev/null
+++ b/src/class38/Test2.java
@@ -0,0 +1,30 @@
+package class38;
+
+public class Test2 {
+    public static void main(String[] args) {
+        //匿名内部类简化类的创建
+        Swim s1 = new Swim() {
+            @Override
+            public void swimminng() {
+                System.out.println("学生🏊‍贼快~~~~");
+            }
+        };
+        start(s1);
+        Swim s2 = new Swim() {
+            @Override
+            public void swimminng() {
+                System.out.println("老师🏊‍贼慢~~~~");
+            }
+        };
+        start(s2);
+
+    }
+    public static void start(Swim s){
+        System.out.println("开始。。。。。");
+        s.swimminng();
+        System.out.println("结束。。。。。");
+    }
+}
+interface Swim{
+    void swimminng();
+}