diff --git a/src/senior/Lambda/Collection.kt b/src/senior/Lambda/Collection.kt
index 27becfa..976ddbb 100644
--- a/src/senior/Lambda/Collection.kt
+++ b/src/senior/Lambda/Collection.kt
@@ -32,6 +32,6 @@ fun main(args: Array<String>) {
 
     // 统计满足条件的元素个数
     println("element num > 10 = ${list.count { it >= 20 }}")
-
+    println("max element = ${list.maxByOrNull { it }}")
 
 }
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