diff --git a/s-day02/src/com/inmind/generic_interface07/Demo10.java b/s-day02/src/com/inmind/generic_interface07/Demo10.java
new file mode 100644
index 0000000..3b334d4
--- /dev/null
+++ b/s-day02/src/com/inmind/generic_interface07/Demo10.java
@@ -0,0 +1,12 @@
+package com.inmind.generic_interface07;
+
+public class Demo10 {
+    public static void main(String[] args) {
+        //创建实现类1对象
+        MyInterfaceImpl myInterface = new MyInterfaceImpl();
+        myInterface.method("hello");
+        //创建实现类2对象（在实现子类中不确定类型，在创建实现类对象时才确定类型）
+        MyInterfaceImpl2<Integer> myInterface2 = new MyInterfaceImpl2<>();
+        myInterface2.method(123);
+    }
+}
diff --git a/s-day02/src/com/inmind/generic_interface07/MyInterface.java b/s-day02/src/com/inmind/generic_interface07/MyInterface.java
new file mode 100644
index 0000000..2a45fc7
--- /dev/null
+++ b/s-day02/src/com/inmind/generic_interface07/MyInterface.java
@@ -0,0 +1,19 @@
+package com.inmind.generic_interface07;
+/*
+    泛型接口：在接口中定义一个未知类型
+    泛型接口的格式：
+     public interface 接口名<大写字母>{
+     }
+
+     泛型接口的泛型类型何时确定？？？
+     1.在定义实现子类中直接确定泛型的类型
+     2.在实现子类中不确定类型，在创建实现类对象时才确定类型
+ */
+public interface MyInterface<T> {
+    //泛型作为参数
+    void method(T t);
+    //泛型作为返回值
+    T method1();
+    //泛型既作为参数又作为返回值
+    T method2(T t);
+}
diff --git a/s-day02/src/com/inmind/generic_interface07/MyInterfaceImpl.java b/s-day02/src/com/inmind/generic_interface07/MyInterfaceImpl.java
new file mode 100644
index 0000000..d079f1b
--- /dev/null
+++ b/s-day02/src/com/inmind/generic_interface07/MyInterfaceImpl.java
@@ -0,0 +1,21 @@
+package com.inmind.generic_interface07;
+/*
+泛型接口的泛型类型何时确定？？？
+     1.在定义实现子类中直接确定泛型的类型
+ */
+public class MyInterfaceImpl implements MyInterface<String>{
+    @Override
+    public void method(String s) {
+
+    }
+
+    @Override
+    public String method1() {
+        return "";
+    }
+
+    @Override
+    public String method2(String s) {
+        return "";
+    }
+}
diff --git a/s-day02/src/com/inmind/generic_interface07/MyInterfaceImpl2.java b/s-day02/src/com/inmind/generic_interface07/MyInterfaceImpl2.java
new file mode 100644
index 0000000..3e9f14b
--- /dev/null
+++ b/s-day02/src/com/inmind/generic_interface07/MyInterfaceImpl2.java
@@ -0,0 +1,23 @@
+package com.inmind.generic_interface07;
+
+/*
+     泛型接口的泛型类型何时确定？？？
+     2.在实现子类中不确定类型，在创建实现类对象时才确定类型
+ */
+public class MyInterfaceImpl2<E> implements MyInterface<E>{
+
+    @Override
+    public void method(E e) {
+
+    }
+
+    @Override
+    public E method1() {
+        return null;
+    }
+
+    @Override
+    public E method2(E e) {
+        return null;
+    }
+}