diff --git a/notes/设计模式.md b/notes/设计模式.md
index 45cc71f6..4f561df4 100644
--- a/notes/设计模式.md
+++ b/notes/设计模式.md
@@ -657,7 +657,7 @@ public class ConcreteHandler1 extends Handler {
 
     @Override
     protected void handleRequest(Request request) {
-        if (request.getType() == RequestType.type1) {
+        if (request.getType() == RequestType.TYPE1) {
             System.out.println(request.getName() + " is handle by ConcreteHandler1");
             return;
         }
@@ -676,7 +676,7 @@ public class ConcreteHandler2 extends Handler{
 
     @Override
     protected void handleRequest(Request request) {
-        if (request.getType() == RequestType.type2) {
+        if (request.getType() == RequestType.TYPE2) {
             System.out.println(request.getName() + " is handle by ConcreteHandler2");
             return;
         }
@@ -709,7 +709,7 @@ public class Request {
 
 ```java
 public enum RequestType {
-    type1, type2
+    TYPE1, TYPE2
 }
 ```
 
@@ -718,9 +718,9 @@ public class Client {
     public static void main(String[] args) {
         Handler handler1 = new ConcreteHandler1(null);
         Handler handler2 = new ConcreteHandler2(handler1);
-        Request request1 = new Request(RequestType.type1, "request1");
+        Request request1 = new Request(RequestType.TYPE1, "request1");
         handler2.handleRequest(request1);
-        Request request2 = new Request(RequestType.type2, "request2");
+        Request request2 = new Request(RequestType.TYPE2, "request2");
         handler2.handleRequest(request2);
     }
 }