diff --git a/pulsar-functions/instance/src/main/java/org/apache/pulsar/functions/windowing/WindowFunctionExecutor.java b/pulsar-functions/instance/src/main/java/org/apache/pulsar/functions/windowing/WindowFunctionExecutor.java
index 83d5102042549..9d56a32cdf6ca 100644
--- a/pulsar-functions/instance/src/main/java/org/apache/pulsar/functions/windowing/WindowFunctionExecutor.java
+++ b/pulsar-functions/instance/src/main/java/org/apache/pulsar/functions/windowing/WindowFunctionExecutor.java
@@ -30,7 +30,11 @@
 
 import lombok.extern.slf4j.Slf4j;
 
-import org.apache.pulsar.functions.api.*;
+import org.apache.pulsar.functions.api.Context;
+import org.apache.pulsar.functions.api.Function;
+import org.apache.pulsar.functions.api.Record;
+import org.apache.pulsar.functions.api.WindowContext;
+import org.apache.pulsar.functions.api.WindowFunction;
 import org.apache.pulsar.common.util.Reflections;
 import org.apache.pulsar.common.functions.WindowConfig;
 import org.apache.pulsar.functions.windowing.evictors.CountEvictionPolicy;
diff --git a/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/window/PublishWindowFunction.java b/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/window/PublishWindowFunction.java
index e623a6b34d319..bf44b1aee28d6 100644
--- a/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/window/PublishWindowFunction.java
+++ b/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/window/PublishWindowFunction.java
@@ -19,9 +19,9 @@
 package org.apache.pulsar.functions.api.examples.window;
 
 import java.util.Collection;
-import org.apache.pulsar.client.api.PulsarClientException;
-import org.apache.pulsar.client.api.Schema;
-import org.apache.pulsar.functions.api.*;
+import org.apache.pulsar.functions.api.Record;
+import org.apache.pulsar.functions.api.WindowContext;
+import org.apache.pulsar.functions.api.WindowFunction;
 
 /**
  * Example function that uses the built in publish function in the context
diff --git a/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/window/UserExceptionWindowFunction.java b/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/window/UserExceptionWindowFunction.java
index 6f56209ed3f6e..d83320031d03d 100644
--- a/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/window/UserExceptionWindowFunction.java
+++ b/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/window/UserExceptionWindowFunction.java
@@ -19,7 +19,9 @@
 package org.apache.pulsar.functions.api.examples.window;
 
 import java.util.Collection;
-import org.apache.pulsar.functions.api.*;
+import org.apache.pulsar.functions.api.Record;
+import org.apache.pulsar.functions.api.WindowContext;
+import org.apache.pulsar.functions.api.WindowFunction;
 
 
 /**
diff --git a/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/window/WordCountWindowFunction.java b/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/window/WordCountWindowFunction.java
index 39f838dca7c15..3e79c2457a61a 100644
--- a/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/window/WordCountWindowFunction.java
+++ b/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/window/WordCountWindowFunction.java
@@ -20,7 +20,9 @@
 
 import java.util.Arrays;
 import java.util.Collection;
-import org.apache.pulsar.functions.api.*;
+import org.apache.pulsar.functions.api.Record;
+import org.apache.pulsar.functions.api.WindowContext;
+import org.apache.pulsar.functions.api.WindowFunction;
 
 /**
  * The classic word count example done using pulsar functions