From 40ca645101806d2a6f49501f916d35c69cac0382 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=B2=89=E9=BB=98=E7=8E=8B=E4=BA=8C?=
 <www.qing_gee@163.com>
Date: Fri, 30 Apr 2021 13:34:42 +0800
Subject: [PATCH] Update Counter.java

---
 .../src/main/java/com/itwanger/twentysix/Counter.java         | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/codes/TechSister/src/main/java/com/itwanger/twentysix/Counter.java b/codes/TechSister/src/main/java/com/itwanger/twentysix/Counter.java
index b5992a9b8..2adb1d66f 100644
--- a/codes/TechSister/src/main/java/com/itwanger/twentysix/Counter.java
+++ b/codes/TechSister/src/main/java/com/itwanger/twentysix/Counter.java
@@ -1,9 +1,11 @@
 package com.itwanger.twentysix;
 
+import java.io.Serializable;
+
 /**
  * @author 微信搜「沉默王二」，回复关键字 PDF
  */
-public class Counter {
+public class Counter implements Serializable {
     int count = 0;
 
     Counter() {
-- 
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