diff --git a/spring-cloud-alibaba-nacos-discovery/src/main/java/org/springframework/cloud/alibaba/nacos/NacosDiscoveryClient.java b/spring-cloud-alibaba-nacos-discovery/src/main/java/org/springframework/cloud/alibaba/nacos/NacosDiscoveryClient.java
index 178333fa..67e6b441 100644
--- a/spring-cloud-alibaba-nacos-discovery/src/main/java/org/springframework/cloud/alibaba/nacos/NacosDiscoveryClient.java
+++ b/spring-cloud-alibaba-nacos-discovery/src/main/java/org/springframework/cloud/alibaba/nacos/NacosDiscoveryClient.java
@@ -65,7 +65,7 @@ public class NacosDiscoveryClient implements DiscoveryClient {
 		nacosServiceInstance.setHost(instance.getIp());
 		nacosServiceInstance.setPort(instance.getPort());
 		nacosServiceInstance.setServiceId(serviceId);
-		Map<String, String> metadata = new HashMap<String, String>();
+		Map<String, String> metadata = new HashMap<>();
 		metadata.put("instanceId", instance.getInstanceId());
 		metadata.put("weight", instance.getWeight() + "");
 		metadata.put("healthy", instance.isHealthy() + "");
@@ -82,7 +82,7 @@ public class NacosDiscoveryClient implements DiscoveryClient {
 
 	private static List<ServiceInstance> hostToServiceInstanceList(
 			List<Instance> instances, String serviceId) {
-		List<ServiceInstance> result = new ArrayList<ServiceInstance>(instances.size());
+		List<ServiceInstance> result = new ArrayList<>(instances.size());
 		for (Instance instance : instances) {
 			result.add(hostToServiceInstance(instance, serviceId));
 		}
diff --git a/spring-cloud-alibaba-nacos-discovery/src/main/java/org/springframework/cloud/alibaba/nacos/ribbon/NacosServerList.java b/spring-cloud-alibaba-nacos-discovery/src/main/java/org/springframework/cloud/alibaba/nacos/ribbon/NacosServerList.java
index c2b4990f..6b83e83c 100644
--- a/spring-cloud-alibaba-nacos-discovery/src/main/java/org/springframework/cloud/alibaba/nacos/ribbon/NacosServerList.java
+++ b/spring-cloud-alibaba-nacos-discovery/src/main/java/org/springframework/cloud/alibaba/nacos/ribbon/NacosServerList.java
@@ -79,4 +79,4 @@ public class NacosServerList extends AbstractServerList<NacosServer> {
 	public void initWithNiwsConfig(IClientConfig iClientConfig) {
 		this.serviceId = iClientConfig.getClientName();
 	}
-}
+}
\ No newline at end of file