From b9ba4ea78a1f507d711615ebcf2448b992aa0e6b Mon Sep 17 00:00:00 2001
From: GlodBlock <1356392126@qq.com>
Date: Mon, 20 Sep 2021 23:49:51 +0800
Subject: fix string overflow

---
 src/main/java/GoodGenerator/util/CharExchanger.java | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

(limited to 'src/main/java/GoodGenerator/util')

diff --git a/src/main/java/GoodGenerator/util/CharExchanger.java b/src/main/java/GoodGenerator/util/CharExchanger.java
index fd7146120f..bcc1554be1 100644
--- a/src/main/java/GoodGenerator/util/CharExchanger.java
+++ b/src/main/java/GoodGenerator/util/CharExchanger.java
@@ -90,18 +90,18 @@ public class CharExchanger {
         for (int i = 0; i < exp.length(); ++i) {
             if (Character.isDigit(exp.charAt(i))) {
                 int cnt = 0, prt = i;
-                while (Character.isDigit(exp.charAt(i))) {
+                while (i < exp.length() && Character.isDigit(exp.charAt(i))) {
                     i ++;
                     cnt ++;
                 }
-                while (Character.isDigit(exp.charAt(prt))) {
+                while (i < exp.length() && Character.isDigit(exp.charAt(prt))) {
                     sb.append(exp.charAt(prt));
                     prt ++;
                     cnt --;
                     if (cnt % 3 == 0 && cnt != 0) sb.append(" ");
                 }
             }
-            sb.append(exp.charAt(i));
+            if (i < exp.length()) sb.append(exp.charAt(i));
         }
         return sb.toString();
     }
-- 
cgit