Consistently declare Object::equals argument as @Nullable

spring-webflux/src/test/java/org/springframework/web/reactive/function/server/DispatcherHandlerIntegrationTests.java

@@ -31,6 +31,7 @@ import org.springframework.http.HttpStatus;
 import org.springframework.http.MediaType;
 import org.springframework.http.ResponseEntity;
 import org.springframework.http.server.reactive.HttpHandler;
+import org.springframework.lang.Nullable;
 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.ResponseBody;
@@ -266,7 +267,7 @@ class DispatcherHandlerIntegrationTests extends AbstractHttpHandlerIntegrationTe
 		}
 
 		@Override
-		public boolean equals(Object o) {
+		public boolean equals(@Nullable Object o) {
 			if (this == o) {
 				return true;
 			}

spring-webflux/src/test/java/org/springframework/web/reactive/function/server/PublisherHandlerFunctionIntegrationTests.java

@@ -27,6 +27,7 @@ import org.springframework.http.HttpMethod;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.RequestEntity;
 import org.springframework.http.ResponseEntity;
+import org.springframework.lang.Nullable;
 import org.springframework.web.client.RestTemplate;
 import org.springframework.web.testfixture.http.server.reactive.bootstrap.HttpServer;
 
@@ -137,7 +138,7 @@ class PublisherHandlerFunctionIntegrationTests extends AbstractRouterFunctionInt
 		}
 
 		@Override
-		public boolean equals(Object o) {
+		public boolean equals(@Nullable Object o) {
 			if (this == o) {
 				return true;
 			}

spring-webflux/src/test/java/org/springframework/web/reactive/function/server/SseHandlerFunctionIntegrationTests.java

@@ -25,6 +25,7 @@ import reactor.test.StepVerifier;
 import org.springframework.core.ParameterizedTypeReference;
 import org.springframework.http.MediaType;
 import org.springframework.http.codec.ServerSentEvent;
+import org.springframework.lang.Nullable;
 import org.springframework.web.reactive.function.client.WebClient;
 import org.springframework.web.testfixture.http.server.reactive.bootstrap.HttpServer;
 
@@ -166,7 +167,7 @@ class SseHandlerFunctionIntegrationTests extends AbstractRouterFunctionIntegrati
 		}
 
 		@Override
-		public boolean equals(Object o) {
+		public boolean equals(@Nullable Object o) {
 			if (this == o) {
 				return true;
 			}

spring-webflux/src/test/java/org/springframework/web/reactive/result/method/annotation/JacksonStreamingIntegrationTests.java

@@ -26,6 +26,7 @@ import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.http.MediaType;
 import org.springframework.http.server.reactive.HttpHandler;
+import org.springframework.lang.Nullable;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RestController;
 import org.springframework.web.reactive.DispatcherHandler;
@@ -144,7 +145,7 @@ class JacksonStreamingIntegrationTests extends AbstractHttpHandlerIntegrationTes
 		}
 
 		@Override
-		public boolean equals(Object o) {
+		public boolean equals(@Nullable Object o) {
 			if (this == o) {
 				return true;
 			}

spring-webflux/src/test/java/org/springframework/web/reactive/result/method/annotation/MessageReaderArgumentResolverTests.java

@@ -349,7 +349,7 @@ public class MessageReaderArgumentResolverTests {
 		}
 
 		@Override
-		public boolean equals(Object o) {
+		public boolean equals(@Nullable Object o) {
 			if (this == o) {
 				return true;
 			}

spring-webflux/src/test/java/org/springframework/web/reactive/result/method/annotation/RequestMappingMessageConversionIntegrationTests.java

@@ -49,6 +49,7 @@ import org.springframework.http.HttpStatus;
 import org.springframework.http.MediaType;
 import org.springframework.http.ResponseEntity;
 import org.springframework.http.codec.json.Jackson2JsonEncoder;
+import org.springframework.lang.Nullable;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
@@ -703,7 +704,7 @@ class RequestMappingMessageConversionIntegrationTests extends AbstractRequestMap
 		}
 
 		@Override
-		public boolean equals(Object o) {
+		public boolean equals(@Nullable Object o) {
 			if (this == o) {
 				return true;
 			}

spring-webflux/src/test/java/org/springframework/web/reactive/result/method/annotation/SseIntegrationTests.java

@@ -42,6 +42,7 @@ import org.springframework.http.client.reactive.JettyClientHttpConnector;
 import org.springframework.http.client.reactive.ReactorClientHttpConnector;
 import org.springframework.http.codec.ServerSentEvent;
 import org.springframework.http.server.reactive.HttpHandler;
+import org.springframework.lang.Nullable;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
@@ -268,7 +269,7 @@ class SseIntegrationTests extends AbstractHttpHandlerIntegrationTests {
 		}
 
 		@Override
-		public boolean equals(Object o) {
+		public boolean equals(@Nullable Object o) {
 			if (this == o) {
 				return true;
 			}