docs: lock demo

docs/en/start/lock/start.md

@@ -76,6 +76,8 @@ The layotto file will be generated in the directory, run it:
 <!-- tabs:end -->
 
 ## step 2. Run the client program, call Layotto to add, delete, modify and query
+<!-- tabs:start -->
+#### **Go**
 
 ```shell
  cd ${project_path}/demo/lock/common/
@@ -98,6 +100,46 @@ client2 succeeded in unlocking
 Demo success!
 ```
 
+#### **Java**
+
+Download java sdk and examples:
+
+```shell @if.not.exist java-sdk
+git clone https://github.com/layotto/java-sdk
+```
+
+Change directory:
+
+```shell
+cd java-sdk
+```
+
+Build:
+
+```shell @if.not.exist examples-lock/target/examples-lock-jar-with-dependencies.jar
+# build example jar
+mvn -f examples-lock/pom.xml clean package
+```
+
+Run the examples:
+
+```shell
+java -jar examples-lock/target/examples-lock-jar-with-dependencies.jar
+```
+
+And you will see:
+
+```bash
+TryLockResponse{success=true}
+TryLockResponse{success=true}
+TryLockResponse{success=true}
+UnlockResponse{status=SUCCESS}
+TryLockResponse{success=true}
+UnlockResponse{status=LOCK_UNEXIST}
+```
+
+<!-- tabs:end -->
+
 ## Next Step
 ### What did this client Demo do?
 The demo client program uses the golang version SDK provided by Layotto, calls the Layotto distributed lock API, and starts multiple goroutines to do locking and unlocking operations.

docs/zh/start/lock/start.md

@@ -78,6 +78,8 @@ go build -o layotto
 <!-- tabs:end -->
 
 ### step 2. 运行客户端程序，调用Layotto抢锁/解锁
+<!-- tabs:start -->
+#### **Go**
 
 ```shell
  cd ${project_path}/demo/lock/common/
@@ -100,6 +102,46 @@ client2 succeeded in unlocking
 Demo success!
 ```
 
+#### **Java**
+
+下载 java sdk 和示例代码:
+
+```shell @if.not.exist java-sdk
+git clone https://github.com/layotto/java-sdk
+```
+
+切换目录:
+
+```shell
+cd java-sdk
+```
+
+构建:
+
+```shell @if.not.exist examples-lock/target/examples-lock-jar-with-dependencies.jar
+# build example jar
+mvn -f examples-lock/pom.xml clean package
+```
+
+运行:
+
+```shell
+java -jar examples-lock/target/examples-lock-jar-with-dependencies.jar
+```
+
+打印出以下信息说明运行成功:
+
+```bash
+TryLockResponse{success=true}
+TryLockResponse{success=true}
+TryLockResponse{success=true}
+UnlockResponse{status=SUCCESS}
+TryLockResponse{success=true}
+UnlockResponse{status=LOCK_UNEXIST}
+```
+
+<!-- tabs:end -->
+
 ### 下一步
 #### 这个客户端程序做了什么？
 示例客户端程序中使用了Layotto提供的golang版本sdk，调用Layotto 分布式锁API,启动多个协程进行抢锁、解锁操作。