diff --git a/docs/java/Basis/Arrays,CollectionsCommonMethods.md b/docs/java/Basis/Arrays,CollectionsCommonMethods.md
index 5c7e705b..ec083552 100644
--- a/docs/java/Basis/Arrays,CollectionsCommonMethods.md
+++ b/docs/java/Basis/Arrays,CollectionsCommonMethods.md
@@ -90,7 +90,7 @@ int max(Collection coll)//根据元素的自然顺序，返回最大的元素。
 int max(Collection coll, Comparator c)//根据定制排序，返回最大元素，排序规则由Comparatator类控制。类比int min(Collection coll, Comparator c)
 void fill(List list, Object obj)//用指定的元素代替指定list中的所有元素。 
 int frequency(Collection c, Object o)//统计元素出现次数
-int indexOfSubList(List list, List target)//统计targe在list中第一次出现的索引，找不到则返回-1，类比int lastIndexOfSubList(List source, list target).
+int indexOfSubList(List list, List target)//统计target在list中第一次出现的索引，找不到则返回-1，类比int lastIndexOfSubList(List source, list target).
 boolean replaceAll(List list, Object oldVal, Object newVal), 用新元素替换旧元素
 ```