diff --git a/clients-schema-registry/.gitignore b/clients-schema-registry/.gitignore
new file mode 100644
index 0000000..eb5a316
--- /dev/null
+++ b/clients-schema-registry/.gitignore
@@ -0,0 +1 @@
+target
diff --git a/clients-schema-registry/java/pom.xml b/clients-schema-registry/java/pom.xml
new file mode 100644
index 0000000..3e07b90
--- /dev/null
+++ b/clients-schema-registry/java/pom.xml
@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>org.apache.pulsar</groupId>
+    <artifactId>schema-registry-demo</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <maven.compiler.source>17</maven.compiler.source>
+        <maven.compiler.target>17</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>io.streamnative</groupId>
+            <artifactId>pulsar-client</artifactId>
+            <version>4.1.0-sr-SNAPSHOT</version>
+        </dependency>
+        <dependency>
+            <groupId>io.streamnative</groupId>
+            <artifactId>schema-registry</artifactId>
+            <version>4.1.0-sr-SNAPSHOT</version>
+        </dependency>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <version>1.18.32</version>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.datatype</groupId>
+            <artifactId>jackson-datatype-guava</artifactId>
+            <version>2.17.2</version>
+        </dependency>
+    </dependencies>
+
+    <repositories>
+        <repository>
+            <id>snapshot</id>
+            <url>https://s01.oss.sonatype.org/content/repositories/snapshots/</url>
+            <releases>
+                <enabled>false</enabled>
+            </releases>
+            <snapshots>
+                <enabled>true</enabled>
+            </snapshots>
+        </repository>
+    </repositories>
+</project>
diff --git a/clients-schema-registry/java/src/main/java/org/apache/pulsar/sn/SchemaRegistryJsonDemo.java b/clients-schema-registry/java/src/main/java/org/apache/pulsar/sn/SchemaRegistryJsonDemo.java
new file mode 100644
index 0000000..54b119a
--- /dev/null
+++ b/clients-schema-registry/java/src/main/java/org/apache/pulsar/sn/SchemaRegistryJsonDemo.java
@@ -0,0 +1,54 @@
+package org.apache.pulsar.sn;
+
+import org.apache.commons.collections4.map.HashedMap;
+import org.apache.pulsar.client.api.Consumer;
+import org.apache.pulsar.client.api.Message;
+import org.apache.pulsar.client.api.Producer;
+import org.apache.pulsar.client.api.PulsarClient;
+import org.apache.pulsar.client.api.Schema;
+import org.apache.pulsar.client.api.SubscriptionInitialPosition;
+import org.apache.pulsar.sr.kafka.KafkaSchemaInfoProviderFactory;
+import org.apache.pulsar.sr.kafka.KafkaSchemas;
+
+import java.util.Map;
+
+public class SchemaRegistryJsonDemo {
+
+    public static void main(String[] args) throws Exception {
+        // set Kafka schema registry related configurations
+        Map<String, String> srConfig = new HashedMap<>();
+        srConfig.put("schema.registry.url", "http://localhost:8001");
+
+        PulsarClient client = PulsarClient.builder()
+                .serviceUrl("pulsar://localhost:6650")
+                .schemaInfoProviderFactory(new KafkaSchemaInfoProviderFactory(srConfig))
+                .build();
+
+        String topic = "json-test";
+
+        Schema<User> schema = KafkaSchemas.JSON(User.class);
+
+        Producer<User> producer = client.newProducer(schema)
+                .topic(topic)
+                .create();
+
+        Consumer<User> consumer = client.newConsumer(schema)
+                .topic(topic)
+                .subscriptionName("sub")
+                .subscriptionInitialPosition(SubscriptionInitialPosition.Earliest)
+                .subscribe();
+
+        for (int i = 0; i < 10; i++) {
+            producer.send(new User("name-" + i, 10 + i));
+        }
+
+        for (int i = 0; i < 10; i++) {
+            Message<User> message = consumer.receive();
+            consumer.acknowledge(message);
+            System.out.println("receive msg " + message.getValue());
+        }
+
+        client.close();
+    }
+
+}
diff --git a/clients-schema-registry/java/src/main/java/org/apache/pulsar/sn/SchemaRegistryKVDemo.java b/clients-schema-registry/java/src/main/java/org/apache/pulsar/sn/SchemaRegistryKVDemo.java
new file mode 100644
index 0000000..5e12d17
--- /dev/null
+++ b/clients-schema-registry/java/src/main/java/org/apache/pulsar/sn/SchemaRegistryKVDemo.java
@@ -0,0 +1,56 @@
+package org.apache.pulsar.sn;
+
+import org.apache.commons.collections4.map.HashedMap;
+import org.apache.pulsar.client.api.Consumer;
+import org.apache.pulsar.client.api.Message;
+import org.apache.pulsar.client.api.Producer;
+import org.apache.pulsar.client.api.PulsarClient;
+import org.apache.pulsar.client.api.Schema;
+import org.apache.pulsar.client.api.SubscriptionInitialPosition;
+import org.apache.pulsar.common.schema.KeyValue;
+import org.apache.pulsar.sr.kafka.KafkaSchemaInfoProviderFactory;
+import org.apache.pulsar.sr.kafka.KafkaSchemas;
+
+import java.util.Map;
+
+public class SchemaRegistryKVDemo {
+
+    public static void main(String[] args) throws Exception {
+        // set Kafka schema registry related configurations
+        Map<String, String> srConfig = new HashedMap<>();
+        srConfig.put("schema.registry.url", "http://localhost:8001");
+
+        PulsarClient client = PulsarClient.builder()
+                .serviceUrl("pulsar://localhost:6650")
+                .schemaInfoProviderFactory(new KafkaSchemaInfoProviderFactory(srConfig))
+                .build();
+
+        String topic = "kv-test";
+
+        Schema<KeyValue<String, User>> schema = KafkaSchemas.KV(
+                Schema.STRING, KafkaSchemas.JSON(User.class));
+
+        Producer<KeyValue<String, User>> producer = client.newProducer(schema)
+                .topic(topic)
+                .create();
+
+        Consumer<KeyValue<String, User>> consumer = client.newConsumer(schema)
+                .topic(topic)
+                .subscriptionName("sub")
+                .subscriptionInitialPosition(SubscriptionInitialPosition.Earliest)
+                .subscribe();
+
+        for (int i = 0; i < 10; i++) {
+            producer.send(new KeyValue<>("key-" + i, new User("name-" + i, 10 + i)));
+        }
+
+        for (int i = 0; i < 10; i++) {
+            Message<KeyValue<String, User>> message = consumer.receive();
+            consumer.acknowledge(message);
+            System.out.println("receive msg " + message.getValue().getKey() + " " + message.getValue().getValue());
+        }
+
+        client.close();
+    }
+
+}
diff --git a/clients-schema-registry/java/src/main/java/org/apache/pulsar/sn/User.java b/clients-schema-registry/java/src/main/java/org/apache/pulsar/sn/User.java
new file mode 100644
index 0000000..04af190
--- /dev/null
+++ b/clients-schema-registry/java/src/main/java/org/apache/pulsar/sn/User.java
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.pulsar.sn;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+public class User {
+
+    private String name;
+    private Integer age;
+
+}
diff --git a/clients-schema-registry/java/src/main/java/org/apache/pulsar/sn/UserKey.java b/clients-schema-registry/java/src/main/java/org/apache/pulsar/sn/UserKey.java
new file mode 100644
index 0000000..cd9a54e
--- /dev/null
+++ b/clients-schema-registry/java/src/main/java/org/apache/pulsar/sn/UserKey.java
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.pulsar.sn;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+public class UserKey {
+
+    private String name;
+    private Integer id;
+
+}