diff --git a/day11/src/com/inmind/class_interface04/Demo05.java b/day11/src/com/inmind/class_interface04/Demo05.java
index c9cc7d9..26a6156 100644
--- a/day11/src/com/inmind/class_interface04/Demo05.java
+++ b/day11/src/com/inmind/class_interface04/Demo05.java
@@ -28,5 +28,17 @@ public class Demo05 {
         hero.defend();
         System.out.println("打怪结束");
         hero.showWeapons();
+        //掉落了技能书（匿名内部类）
+        Skill skill = new Skill() {
+            @Override
+            public void outSkill() {
+                System.out.println("释放天火燎原");
+            }
+        };
+        //英雄获取技能
+        hero.setSkill(skill);
+        //释放技能
+        hero.useSkill();
+
     }
 }
diff --git a/day11/src/com/inmind/class_interface04/Hero.java b/day11/src/com/inmind/class_interface04/Hero.java
index 54dcbc6..6964414 100644
--- a/day11/src/com/inmind/class_interface04/Hero.java
+++ b/day11/src/com/inmind/class_interface04/Hero.java
@@ -8,7 +8,8 @@ public class Hero {
     private Weapon weapon;//武器
     private Armor armor;//防御装
     private ArrayList<Weapon> weapons = new ArrayList<>();//武器背包
-    //技能
+    //技能作为属性
+    private Skill skill;
 
 
     public Hero() {
@@ -56,6 +57,14 @@ public class Hero {
         this.weapons = weapons;
     }
 
+    public Skill getSkill() {
+        return skill;
+    }
+
+    public void setSkill(Skill skill) {
+        this.skill = skill;
+    }
+
     //攻击和防御行为
     public void attack(){
         //哪个英雄，使用什么武器，输出了多少伤害
@@ -75,4 +84,10 @@ public class Hero {
             System.out.println(w.getName()+", ");
         }
     }
+
+    //英雄释放技能
+    public void useSkill(){
+        System.out.println(this.name += "释放技能：");
+        this.skill.outSkill();
+    }
 }
diff --git a/day11/src/com/inmind/class_interface04/Skill.java b/day11/src/com/inmind/class_interface04/Skill.java
new file mode 100644
index 0000000..ab95676
--- /dev/null
+++ b/day11/src/com/inmind/class_interface04/Skill.java
@@ -0,0 +1,5 @@
+package com.inmind.class_interface04;
+//技能接口
+public interface Skill {
+    void outSkill();
+}