diff --git a/docs/java/io/io-basis.md b/docs/java/io/io-basis.md
index cae212df..a9264984 100755
--- a/docs/java/io/io-basis.md
+++ b/docs/java/io/io-basis.md
@@ -256,7 +256,7 @@ The content read from file:我是Guide。
 
 ```java
 // 字符流转换为字节流的桥梁
-public class InputStreamReader extends Reader {
+public class OutputStreamWriter extends Writer {
 }
 // 用于写入字符到文件
 public class FileWriter extends OutputStreamWriter {