diff --git a/docs/notes/20. 接口优于抽象类.md b/docs/notes/20. 接口优于抽象类.md index daebfab..afb63f2 100644 --- a/docs/notes/20. 接口优于抽象类.md +++ b/docs/notes/20. 接口优于抽象类.md @@ -53,7 +53,7 @@ static List intArrayAsList(int[] a) { @Override public Integer set(int i, Integer val) { - int oldVal = a[I]; + int oldVal = a[i]; a[i] = val; // Auto-unboxing return oldVal; // Autoboxing }