diff --git a/docs/java/new-features/java8-common-new-features.md b/docs/java/new-features/java8-common-new-features.md
index 84737dd4..37b659a7 100644
--- a/docs/java/new-features/java8-common-new-features.md
+++ b/docs/java/new-features/java8-common-new-features.md
@@ -186,7 +186,7 @@ public class LambdaClass {
     }
     //函数式接口参数
     static void lambdaInterfaceDemo(LambdaInterface i){
-        System.out.println(i);
+        i.f();
     }
 }
 ```