diff --git a/core/src/main/java/com/taobao/arthas/core/util/Decompiler.java b/core/src/main/java/com/taobao/arthas/core/util/Decompiler.java
index bea91e8ec..1e27e9757 100644
--- a/core/src/main/java/com/taobao/arthas/core/util/Decompiler.java
+++ b/core/src/main/java/com/taobao/arthas/core/util/Decompiler.java
@@ -3,7 +3,6 @@ package com.taobao.arthas.core.util;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
-import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;