diff --git a/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/plugin/PluginFinder.java b/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/plugin/PluginFinder.java
index baeffb06a..058df0569 100644
--- a/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/plugin/PluginFinder.java
+++ b/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/plugin/PluginFinder.java
@@ -10,7 +10,7 @@ import net.bytebuddy.description.annotation.AnnotationDescription;
 import net.bytebuddy.description.annotation.AnnotationList;
 import net.bytebuddy.description.type.TypeDescription;
 import net.bytebuddy.matcher.ElementMatcher;
-import org.skywalking.apm.agent.core.plugin.bytebuddy.judge.AbstractJunction;
+import org.skywalking.apm.agent.core.plugin.bytebuddy.AbstractJunction;
 import org.skywalking.apm.agent.core.plugin.match.AnnotationMatch;
 import org.skywalking.apm.agent.core.plugin.match.ClassMatch;
 import org.skywalking.apm.agent.core.plugin.match.NameMatch;
diff --git a/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/plugin/bytebuddy/judge/AbstractJunction.java b/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/plugin/bytebuddy/AbstractJunction.java
similarity index 88%
rename from apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/plugin/bytebuddy/judge/AbstractJunction.java
rename to apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/plugin/bytebuddy/AbstractJunction.java
index 8fbacd219..2c4e7e603 100644
--- a/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/plugin/bytebuddy/judge/AbstractJunction.java
+++ b/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/plugin/bytebuddy/AbstractJunction.java
@@ -1,4 +1,4 @@
-package org.skywalking.apm.agent.core.plugin.bytebuddy.judge;
+package org.skywalking.apm.agent.core.plugin.bytebuddy;
 
 import net.bytebuddy.matcher.ElementMatcher;
 
diff --git a/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/plugin/bytebuddy/AllObjectDefaultMethodsMatch.java b/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/plugin/bytebuddy/AllObjectDefaultMethodsMatch.java
deleted file mode 100644
index a887c8fd7..000000000
--- a/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/plugin/bytebuddy/AllObjectDefaultMethodsMatch.java
+++ /dev/null
@@ -1,63 +0,0 @@
-package org.skywalking.apm.agent.core.plugin.bytebuddy;
-
-import net.bytebuddy.description.method.MethodDescription;
-import net.bytebuddy.matcher.ElementMatcher;
-import net.bytebuddy.matcher.ElementMatchers;
-
-import static net.bytebuddy.matcher.ElementMatchers.named;
-import static net.bytebuddy.matcher.ElementMatchers.takesArguments;
-
-/**
- * match all methods, which inherits from {@link Object}
- * <p>
- * Created by wusheng on 2017/1/3.
- */
-public enum AllObjectDefaultMethodsMatch implements ElementMatcher<MethodDescription> {
-    /**
-     * Stay in singleton.
-     */
-    INSTANCE;
-
-    /**
-     * The matcher will be init in constructor and stay permanent.
-     */
-    private final ElementMatcher.Junction<MethodDescription> matcher;
-
-    /**
-     * Init the match, include {@link Object}'s methods.
-     */
-    AllObjectDefaultMethodsMatch() {
-        ElementMatcher.Junction<MethodDescription>[] allDefaultMethods = new ElementMatcher.Junction[] {
-            named("finalize").and(takesArguments(0)).and(ElementMatchers.<MethodDescription>isPublic()),
-            named("wait").and(takesArguments(0)).and(ElementMatchers.<MethodDescription>isPublic()),
-            named("wait").and(takesArguments(long.class, int.class)).and(ElementMatchers.<MethodDescription>isPublic()),
-            named("wait").and(takesArguments(long.class)).and(ElementMatchers.<MethodDescription>isPublic()),
-            named("equals").and(takesArguments(Object.class)).and(ElementMatchers.<MethodDescription>isPublic()),
-            named("toString").and(takesArguments(0)).and(ElementMatchers.<MethodDescription>isPublic()),
-            named("hashCode").and(takesArguments(0)).and(ElementMatchers.<MethodDescription>isPublic()),
-            named("getClass").and(takesArguments(0)).and(ElementMatchers.<MethodDescription>isPublic()),
-            named("clone").and(takesArguments(0)).and(ElementMatchers.<MethodDescription>isPublic()),
-            named("notify").and(takesArguments(0)).and(ElementMatchers.<MethodDescription>isPublic()),
-            named("notifyAll").and(takesArguments(0)).and(ElementMatchers.<MethodDescription>isPublic())};
-
-        ElementMatcher.Junction<MethodDescription> newMatcher = null;
-        for (int i = 0; i < allDefaultMethods.length; i++) {
-            if (i == 0) {
-                newMatcher = allDefaultMethods[i];
-            } else {
-                newMatcher = newMatcher.or(allDefaultMethods[i]);
-            }
-        }
-
-        matcher = newMatcher;
-    }
-
-    /**
-     * @param target method description.
-     * @return true, if the method inherit from {@link Object}'s methods.
-     */
-    @Override
-    public boolean matches(MethodDescription target) {
-        return matcher.matches(target);
-    }
-}