diff --git a/docs/java/jvm/jvm-garbage-collection.md b/docs/java/jvm/jvm-garbage-collection.md
index 472b2be5..afac745a 100644
--- a/docs/java/jvm/jvm-garbage-collection.md
+++ b/docs/java/jvm/jvm-garbage-collection.md
@@ -79,7 +79,6 @@ Java 堆是垃圾收集器管理的主要区域，因此也被称作**GC 堆（G
 -XX:+PrintGCDetails
 -XX:TargetSurvivorRatio=60
 -XX:+PrintTenuringDistribution
--XX:+PrintGCDetails
 -XX:+PrintGCDateStamps
 -XX:MaxTenuringThreshold=3
 -XX:+UseConcMarkSweepGC