Spring cleaning: add missing @⁠Override annotations

spring-context/src/main/java/org/springframework/validation/Errors.java

@@ -395,6 +395,7 @@ public interface Errors {
 	 * e.g. for inclusion in an exception message.
 	 * @see #failOnError(Function)
 	 */
+	@Override
 	String toString();
 
 }

spring-core/src/test/java/org/springframework/util/ClassUtilsTests.java

@@ -625,6 +625,7 @@ class ClassUtilsTests {
 
 		}
 
+		@Override
 		public void packageAccessiblePrint() {
 
 		}

spring-jdbc/src/test/java/org/springframework/jdbc/core/BeanPropertyRowMapperTests.java

@@ -204,6 +204,7 @@ class BeanPropertyRowMapperTests extends AbstractRowMapperTests {
 
 	private static class CustomPerson extends Person {
 
+		@Override
 		@MyColumnName("birthdate")
 		public void setBirth_date(Date date) {
 			super.setBirth_date(date);

spring-messaging/src/test/java/org/springframework/messaging/rsocket/service/RSocketServiceIntegrationTests.java

@@ -127,10 +127,12 @@ class RSocketServiceIntegrationTests {
 	@Controller
 	static class ServerController implements Service {
 
+		@Override
 		public Mono<String> echoAsync(String payload) {
 			return Mono.delay(Duration.ofMillis(10)).map(aLong -> payload + " async");
 		}
 
+		@Override
 		public Flux<String> echoStream(String payload) {
 			return Flux.interval(Duration.ofMillis(10)).map(aLong -> payload + " " + aLong);
 		}

spring-messaging/src/test/java/org/springframework/messaging/simp/annotation/support/SimpAnnotationMethodMessageHandlerTests.java

@@ -546,6 +546,7 @@ public class SimpAnnotationMethodMessageHandlerTests {
 
 		Map<String, Object> arguments = new LinkedHashMap<>();
 
+		@Override
 		@MessageMapping("/binding/id/{id}")
 		public void simpleBinding(Long id) {
 			this.method = "simpleBinding";

spring-web/src/main/java/org/springframework/web/service/invoker/ReactiveHttpRequestValues.java

@@ -85,6 +85,7 @@ public final class ReactiveHttpRequestValues extends HttpRequestValues {
 	 * <p>This is mutually exclusive with {@link #getBodyValue()}.
 	 * Only one of the two or neither is set.
 	 */
+	@Override
 	@SuppressWarnings("removal")
 	@Nullable
 	public Publisher<?> getBody() {
@@ -94,6 +95,7 @@ public final class ReactiveHttpRequestValues extends HttpRequestValues {
 	/**
 	 * Return the element type for a {@linkplain #getBodyPublisher() body publisher}.
 	 */
+	@Override
 	@SuppressWarnings("removal")
 	@Nullable
 	public ParameterizedTypeReference<?> getBodyElementType() {

spring-web/src/main/java/org/springframework/web/util/UriComponentsBuilder.java

@@ -500,6 +500,7 @@ public class UriComponentsBuilder implements UriBuilder, Cloneable {
 	 * @since 4.1
 	 * @see UriComponents#toUriString()
 	 */
+	@Override
 	public String toUriString() {
 		return (this.uriVariables.isEmpty() ?
 				build().encode().toUriString() :

spring-websocket/src/main/java/org/springframework/web/socket/config/annotation/WebMvcStompEndpointRegistry.java

@@ -142,6 +142,7 @@ public class WebMvcStompEndpointRegistry implements StompEndpointRegistry {
 		return this;
 	}
 
+	@Override
 	public WebMvcStompEndpointRegistry setPreserveReceiveOrder(boolean preserveReceiveOrder) {
 		this.stompHandler.setPreserveReceiveOrder(preserveReceiveOrder);
 		return this;