[Doc] Add schema examples for Java client (apache#11420)

* [Doc] Add schema examples for Java client

* update

Co-authored-by: Anonymitaet <anonymitaet_hotmail.com>

site2/docs/client-libraries-java.md

@@ -733,7 +733,7 @@ Producer<byte[]> producer = client.newProducer()
 
 The producer above is equivalent to a `Producer<byte[]>` (in fact, you should *always* explicitly specify the type). If you'd like to use a producer for a different type of data, you'll need to specify a **schema** that informs Pulsar which data type will be transmitted over the [topic](reference-terminology.md#topic).
 
-### Schema example
+### AvroBaseStructSchema example
 
 Let's say that you have a `SensorReading` class that you'd like to transmit over a Pulsar topic:
 
@@ -817,6 +817,10 @@ The following schema formats are currently available for Java:
         .create();
   ```
 
+### ProtobufNativeSchema example
+
+For example of ProtobufNativeSchema, see [`SchemaDefinition` in `Complex type`](schema-understand.md#complex-type).
+
 ## Authentication
 
 Pulsar currently supports three authentication schemes: [TLS](security-tls-authentication.md), [Athenz](security-athenz.md), and [Oauth2](security-oauth2.md). You can use the Pulsar Java client with all of them.

site2/website/versioned_docs/version-2.8.0/client-libraries-java.md

@@ -732,7 +732,7 @@ Producer<byte[]> producer = client.newProducer()
 
 The producer above is equivalent to a `Producer<byte[]>` (in fact, you should *always* explicitly specify the type). If you'd like to use a producer for a different type of data, you'll need to specify a **schema** that informs Pulsar which data type will be transmitted over the [topic](reference-terminology.md#topic).
 
-### Schema example
+### AvroBaseStructSchema example
 
 Let's say that you have a `SensorReading` class that you'd like to transmit over a Pulsar topic:
 
@@ -816,6 +816,10 @@ The following schema formats are currently available for Java:
         .create();
   ```
 
+### ProtobufNativeSchema example
+
+For example of ProtobufNativeSchema, see [`SchemaDefinition` in `Complex type`](schema-understand.md#complex-type).
+
 ## Authentication
 
 Pulsar currently supports three authentication schemes: [TLS](security-tls-authentication.md), [Athenz](security-athenz.md), and [Oauth2](security-oauth2.md). You can use the Pulsar Java client with all of them.

site2/website/versioned_docs/version-2.8.1/client-libraries-java.md

@@ -735,7 +735,7 @@ Producer<byte[]> producer = client.newProducer()
 
 The producer above is equivalent to a `Producer<byte[]>` (in fact, you should *always* explicitly specify the type). If you'd like to use a producer for a different type of data, you'll need to specify a **schema** that informs Pulsar which data type will be transmitted over the [topic](reference-terminology.md#topic).
 
-### Schema example
+### AvroBaseStructSchema example
 
 Let's say that you have a `SensorReading` class that you'd like to transmit over a Pulsar topic:
 
@@ -819,6 +819,10 @@ The following schema formats are currently available for Java:
         .create();
   ```
 
+### ProtobufNativeSchema example
+
+For example of ProtobufNativeSchema, see [`SchemaDefinition` in `Complex type`](schema-understand.md#complex-type).
+
 ## Authentication
 
 Pulsar currently supports three authentication schemes: [TLS](security-tls-authentication.md), [Athenz](security-athenz.md), and [Oauth2](security-oauth2.md). You can use the Pulsar Java client with all of them.