diff --git a/day10/src/com/inmind/interface01/Demo01.java b/day10/src/com/inmind/interface_abstract01/Demo01.java
similarity index 95%
rename from day10/src/com/inmind/interface01/Demo01.java
rename to day10/src/com/inmind/interface_abstract01/Demo01.java
index 6f8acfd..776d0ae 100644
--- a/day10/src/com/inmind/interface01/Demo01.java
+++ b/day10/src/com/inmind/interface_abstract01/Demo01.java
@@ -1,4 +1,4 @@
-package com.inmind.interface01;
+package com.inmind.interface_abstract01;
 /*
 接口就是生活中的规范，规则
 定义格式
diff --git a/day10/src/com/inmind/interface01/MyInterface.java b/day10/src/com/inmind/interface_abstract01/MyInterface.java
similarity index 90%
rename from day10/src/com/inmind/interface01/MyInterface.java
rename to day10/src/com/inmind/interface_abstract01/MyInterface.java
index 38bd010..fccf1f0 100644
--- a/day10/src/com/inmind/interface01/MyInterface.java
+++ b/day10/src/com/inmind/interface_abstract01/MyInterface.java
@@ -1,4 +1,4 @@
-package com.inmind.interface01;
+package com.inmind.interface_abstract01;
 /*
 接口中抽象方法定义：
 public abstract 返回值类型 抽象方法名();
diff --git a/day10/src/com/inmind/interface01/MyInterfaceImpl.java b/day10/src/com/inmind/interface_abstract01/MyInterfaceImpl.java
similarity index 90%
rename from day10/src/com/inmind/interface01/MyInterfaceImpl.java
rename to day10/src/com/inmind/interface_abstract01/MyInterfaceImpl.java
index b9191c9..152f6a2 100644
--- a/day10/src/com/inmind/interface01/MyInterfaceImpl.java
+++ b/day10/src/com/inmind/interface_abstract01/MyInterfaceImpl.java
@@ -1,4 +1,4 @@
-package com.inmind.interface01;
+package com.inmind.interface_abstract01;
 //实现类
 public class MyInterfaceImpl implements MyInterface {
     @Override
diff --git a/day10/src/com/inmind/interface_default02/Demo02.java b/day10/src/com/inmind/interface_default02/Demo02.java
new file mode 100644
index 0000000..e2878ef
--- /dev/null
+++ b/day10/src/com/inmind/interface_default02/Demo02.java
@@ -0,0 +1,24 @@
+package com.inmind.interface_default02;
+/*
+接口是可以进行接口升级，添加功能，之前添加功能方法只能添加抽象方法，导致所有的实现类都必须要修改，这样非常麻烦
+为了解决该问题，在jdk8中添加了默认方法来解决。
+
+默认方法的定义方法：
+public default void method1(){
+
+};
+接口中默认方法的作用：可以让接口进行功能升级，不会影响每个实现类，每个实现类可以选择性地继承或者重写指定的功能
+
+ */
+public class Demo02 {
+    public static void main(String[] args) {
+        //创建接口的2个实现类对象
+        MyInterfaceImpl1 myInterfaceImpl1 = new MyInterfaceImpl1();
+        myInterfaceImpl1.method();
+        myInterfaceImpl1.method1();//直接继承父接口提供 默认方法
+        MyInterfaceImpl2 myInterfaceImpl2 = new MyInterfaceImpl2();
+        myInterfaceImpl2.method();
+        myInterfaceImpl2.method1();//直接重写父接口提供 默认方法
+
+    }
+}
diff --git a/day10/src/com/inmind/interface_default02/MyInterface.java b/day10/src/com/inmind/interface_default02/MyInterface.java
new file mode 100644
index 0000000..0475873
--- /dev/null
+++ b/day10/src/com/inmind/interface_default02/MyInterface.java
@@ -0,0 +1,9 @@
+package com.inmind.interface_default02;
+
+public interface MyInterface {
+    public abstract void method();
+    //添加新的功能方法,不想影响已经定义好的实现类
+    public default void method1(){
+        System.out.println("接口默认提供的method1方法");
+    };
+}
diff --git a/day10/src/com/inmind/interface_default02/MyInterfaceImpl1.java b/day10/src/com/inmind/interface_default02/MyInterfaceImpl1.java
new file mode 100644
index 0000000..3703c99
--- /dev/null
+++ b/day10/src/com/inmind/interface_default02/MyInterfaceImpl1.java
@@ -0,0 +1,8 @@
+package com.inmind.interface_default02;
+
+public class MyInterfaceImpl1 implements MyInterface{
+    @Override
+    public void method() {
+        System.out.println("实现类MyInterfaceImpl1的method方法");
+    }
+}
diff --git a/day10/src/com/inmind/interface_default02/MyInterfaceImpl2.java b/day10/src/com/inmind/interface_default02/MyInterfaceImpl2.java
new file mode 100644
index 0000000..ecef475
--- /dev/null
+++ b/day10/src/com/inmind/interface_default02/MyInterfaceImpl2.java
@@ -0,0 +1,15 @@
+package com.inmind.interface_default02;
+
+public class MyInterfaceImpl2 implements MyInterface{
+    @Override
+    public void method() {
+        System.out.println("实现类MyInterfaceImpl2的method方法");
+    }
+
+    //ctrl+o
+    @Override
+    public void method1() {
+        //MyInterface.super.method1();//重写的作用：沿用父类的功能
+        System.out.println("实现类2重写了接口中的默认方法method1");
+    }
+}