From e3ad8f5c88b2ccc513a99753e221ba71b4aa0cda Mon Sep 17 00:00:00 2001
From: CyC2018 <1029579233@qq.com>
Date: Fri, 11 May 2018 16:25:23 +0800
Subject: [PATCH] auto commit

---
 notes/剑指 offer 题解.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/notes/剑指 offer 题解.md b/notes/剑指 offer 题解.md
index 5e2b2553..b785b54d 100644
--- a/notes/剑指 offer 题解.md	
+++ b/notes/剑指 offer 题解.md	
@@ -1017,6 +1017,8 @@ public boolean match(char[] str, char[] pattern) {
 
 ```java
 public boolean isNumeric(char[] str) {
+    if (str == null)
+        return false;
     return new String(str).matches("[+-]?\\d*(\\.\\d+)?([eE][+-]?\\d+)?");
 }
 ```